[题目简述]:事实上就是依据题目描写叙述:A permutation of the integers 1 to n is an ordering of these integers. So the natural way to represent a permutation is to list the integers in this order. With n = 5, a permutation might look like 2, 3, 4, 5, 1. However, there i…
[题目简述]:两个四位数,假设后一个数中的某个数与前一个相应的数的位置和值都相等.则统计数目由几个这种数.记为count1吧. 假设后一个数中的某个数与前一个数的数值相等,但位置不同. 此时这种数的个数记为count2. 写成*A*B,即count1 A count2 B. [分析]:题目的简述即分析. //740K 0Ms #include<iostream> #include<cstring> using namespace std; int main() { int T; s…
[poj P1141] Brackets Sequence Time Limit: 1000MS Memory Limit: 65536K Special Judge Description Let us define a regular brackets sequence in the following way: 1. Empty sequence is a regular sequence. 2. If S is a regular sequence, then (S) and […