int范围内的大数取得inf = 1<<31-1
int = 4e9
2^15 = 3e4
long = 1.8e19
自用头文件:
#include <iostream> #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include <string> #include <stack> #include <vector> #include <queue> #include <algorithm> using namespace std;