做题头文件

 1 #include<bits/stdc++.h>
 2 using namespace std;
 3 #define ll long long
 4 #define inf 0x3f3f3f3f
 5 #define mod 1000000007
 6 #define lson 2*n
 7 #define rson 2*n+1
 8 #define mid (l+r)/2
 9 #define mit map<int,int>::iterator
10 #define sit set<int>::ierator
11 #define mp make_pair
12 #define pb push_back
13 #define pii pair<int,int>
14 #define pi acos(-1)
15 const int maxn 1000000
16 int main()
17 {
18     
19     return 0;
20 }