常用头文件

#include<bits/stdc++.h>
#define INF 0x3f3f3f3f
#define DOF 0x7f7f7f7f
#define endl ‘\n‘
#define mem(a,b) memset(a,b,sizeof(a))
#define debug(case,x); cout<<case<<"  : "<<x<<endl;
#define IO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0)
typedef long long ll;
using namespace std;
const int maxn = 2e5 + 10;

int main()
{
    //    freopen("ii.txt","r",stdin);
    //   freopen("oo.txt","w",stdout);
}

#include <iostream>
#include<algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <queue>
#include<map>
#include<set>
#include<stack>
#include<string>
#include<sstream>
#define endl ‘\n‘
#define debug(case,x); cout<<case<<"  : "<<x<<endl;
#define INF 0x3f3f3f3f
#define DOF 0x7f7f7f7f
#define mem(a,b) memset(a,b,sizeof(a))
#define IO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0)
typedef long long ll;
using namespace std;

int main()
{
    //    freopen("ii.txt","r",stdin);
    //    freopen("oo.txt","w",stdout);
    
}

常用头文件

原文：https://www.cnblogs.com/waryan/p/13176400.html