摘要：
1 求第k个排列2 求给定排列在全排列中的序号3 求下k个排列#include <iostream>#include <stdlib.h>//#include <algorithm>#include <map>#include <time.h>using namespace std;unsigned int mp[1000+1] = {1, 1, 2, 6, 24, 120, 720};unsigned int Fatorail(int n){ unsigned int value=1; if (mp[n]) return mp[n] 阅读全文
