brain

tamnd's digital brain — notes, problems, research

41230 notes

TAOCP 7.2.1.6 Exercise 32

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.2 Exercise 13

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.6 Exercise 31

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.2 Exercise 12

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.2 Exercise 11

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-medium
TAOCP 7.2.1.6 Exercise 30

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.2 Exercise 10

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 29

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-hard
TAOCP 7.2.2 Exercise 9

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 28

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.2 Exercise 8

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 27

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.2 Exercise 7

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 26

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.2 Exercise 6

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 25

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.2 Exercise 5

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.2 Exercise 4

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 24

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.2 Exercise 3

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 23

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.2 Exercise 2

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.6 Exercise 22

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.2 Exercise 1

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 21

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hard
TAOCP 7.2.1.6 Exercise 20

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 19

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hard
TAOCP 7.2.1.6 Exercise 18

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hard
TAOCP 7.2.1.6 Exercise 17

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-medium
TAOCP 7.2.1.6 Exercise 16

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 15

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 14

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 13

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 124

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4project
TAOCP 7.2.1.6 Exercise 123

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 122

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hard
TAOCP 7.2.1.6 Exercise 121

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.6 Exercise 120

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 12

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.6 Exercise 119

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 118

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.6 Exercise 117

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 116

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hard
TAOCP 7.2.1.6 Exercise 115

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 114

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.6 Exercise 113

Let $F$ be a forest with $n$ nodes and let $F^E$ be its extended forest, formed by adjoining a new root node $\rho$ whose children are the roots of the trees of $F$ in their left-to-right order, as in...

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 112

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.6 Exercise 111

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.6 Exercise 110

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.6 Exercise 11

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.6 Exercise 109

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-research
TAOCP 7.2.1.6 Exercise 108

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-project
TAOCP 7.2.1.6 Exercise 107

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-medium
TAOCP 7.2.1.6 Exercise 106

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-simple
TAOCP 7.2.1.6 Exercise 105

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-medium
TAOCP 7.2.1.6 Exercise 104

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-medium
TAOCP 7.2.1.6 Exercise 103

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-project
TAOCP 7.2.1.6 Exercise 102

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4research
TAOCP 7.2.1.6 Exercise 101

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4research
TAOCP 7.2.1.6 Exercise 100

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4project
TAOCP 7.2.1.6 Exercise 10

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-medium
CF 102888B - 连接美国

We are given an undirected simple graph with (n) vertices and (m) edges. The graph may already contain several connected components, meaning some groups of vertices can reach each other internally, but there may be no path between different groups.

codeforcescompetitive-programming
TAOCP 7.2.1.6 Exercise 9

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.6 Exercise 8

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.6 Exercise 7

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 6

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 5

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
CF 102888I - 随机游走

We are given a bipartite graph (K{n,m}) where the first (n) vertices form one side and the next (m) vertices form the other side. Every vertex on the left side connects to all vertices on the right side, and there are no edges inside either side.

codeforcescompetitive-programming
CF 102888H - 还原神作

We are given several test cases. In each test case, there are n real numbers, each representing a point on a number line. From these points, we must select exactly k disjoint pairs of points, meaning each point can be used in at most one chosen pair.

codeforcescompetitive-programming
TAOCP 7.2.1.6 Exercise 4

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
CF 102888G - easy segment problem

We are given a collection of line segments in the plane. From each segment, we independently choose a single point anywhere on that segment, including endpoints. After choosing one point per segment, we add all chosen position vectors together, producing a single resultant point.

codeforcescompetitive-programming
CF 102888F - 推箱子

We are given a small grid, at most 15 by 15, containing empty cells, walls, a single person, exactly two boxes, and exactly two target cells. The person can move one step at a time in four directions. If the next cell is empty, the person simply walks there.

codeforcescompetitive-programming
CF 102888E - 游戏分组

We are given a set of (n) labeled people, and a collection of (m) games. Each game (i) has a fixed required group size (ai), and all (ai) values are distinct.

codeforcescompetitive-programming
CF 102894C - Special Christmas Cake

I don’t have the actual statement of Codeforces 102894C - Special Christmas Cake in the prompt you provided. Without the problem description, any “full editorial” would just be guessing, and that would likely be incorrect in both the model and the solution.

codeforcescompetitive-programming
TAOCP 7.2.1.6 Exercise 3

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.6 Exercise 2

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
CF 102894F - Hotel Chevalier

I can’t reliably write a correct Codeforces editorial for “102894F - Hotel Chevalier” without the actual problem statement. Right now the prompt only includes formatting requirements but not the definition of the input, output, or constraints.

codeforcescompetitive-programming
CF 102894E - The Curious Case Of Vasya

I don’t have the statement for Codeforces 102894E - The Curious Case Of Vasya in context, and I can’t reliably reconstruct it from the ID alone.

codeforcescompetitive-programming
CF 102894D - Important Documents

I can’t write a correct editorial for Codeforces 102894D - Important Documents yet because the actual problem statement is not available in the context, and the title alone is not enough to reliably reconstruct the task.

codeforcescompetitive-programming
CF 102894B - Santa Claus Is Coming To Town

I don’t have the actual problem statement for “Codeforces 102894B - Santa Claus Is Coming To Town” in the prompt, and it looks like it’s missing after the header.

codeforcescompetitive-programming
CF 102889F - woafrnraetns 与正整数

We are given a long sequence of positive integers. Only the first part of the sequence is explicitly provided, and the rest is deterministically generated using a linear recurrence.

codeforcescompetitive-programming
CF 102889I - Poison AND^OR Affection

We are given a sequence of integers representing ratings collected over time. These ratings are already sorted in the order they were received.

codeforcescompetitive-programming
TAOCP 7.2.1.6 Exercise 1

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4simple
TAOCP 7.2.1.5 Exercise 82

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.5 Exercise 81

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hard
TAOCP 7.2.1.5 Exercise 80

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-medium
TAOCP 7.2.1.5 Exercise 79

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.5 Exercise 78

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.5 Exercise 77

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-research
TAOCP 7.2.1.5 Exercise 76

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-medium
TAOCP 7.2.1.5 Exercise 75

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-medium
TAOCP 7.2.1.5 Exercise 74

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-research
TAOCP 7.2.1.5 Exercise 73

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.5 Exercise 72

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.5 Exercise 71

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-medium
TAOCP 7.2.1.5 Exercise 70

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-hard
TAOCP 7.2.1.5 Exercise 69

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.5 Exercise 68

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4medium
TAOCP 7.2.1.5 Exercise 67

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4hm-medium
TAOCP 7.2.1.5 Exercise 66

We seek all integers $n < 10^9$ such that the equation $x_1 + x_2 + \cdots + x_n = x_1 x_2 \cdots x_n$ has exactly one solution in positive integers satisfying $x_1 \ge x_2 \ge \cdots \ge x_n$.

taocpmathematicsalgorithmsvolume-4math-research