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>::iterator10 #define sit set<int>::ierator11 #define mp make_pair12 #define pb push_back13 #define pii pair<int,int>14 #define pi acos(-1)15 const int maxn 100000016 int main()17 {18     19     return 0;20 }