做题头文件

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define inf 0x3f3f3f3f
#define mod 1000000007
#define lson 2*n
#define rson 2*n+1
#define mid (l+r)/2
#define mit map<int,int>::iterator
#define sit set<int>::iterator
#define mp make_pair
#define pb push_back
#define pii pair<int,int>
#define pi acos(-1)
const int maxn 1000000
int main()
{
    
    return 0;
}