ACM常用模板

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <string>
#include <cstring>
#include <sstream>
#include <vector>
#include <set>
#include <list>
#include <stack>
#include <queue>
#include <cmath>
#include <map>
#define LL long long
#define MOD 1000000007
#define INF 0x3f3f3f3f
using namespace std;
const int MAXN = 1e5 + 10;

一、头文件

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<sstream>
#include<vector>
#include<stack>
#include<queue>
#include<cmath>
#include<map>
#define LL long long
#define N 1000100
#define MOD 1000000007
#define FOR(i,l,r) for(int i = (l);i<=l;i++)
#define INF 0x7fffffff
#define pb push_back
#define X first
#define Y second
using namespace std;

二、常用输入模板

while(scanf("%d%d",&n,&m) != EOF)

三、简化代码

FOR(i,1,n) scanf("%d",&a[i]);
FOR(i,1,k){
    //代码段 
}