#include <bits/stdc++.h>
using namespace std;
const double PI = acos(-1.0);
const int INF = 0x3f3f3f3f;
const long long LINF = 0x3f3f3f3f3f3f3f3f;
const int N = 1e5 + 9;
const int shift = 1e3 + 9;
const double Eps = 1e-7;
int main(void) {
  if (fopen("in", "r") != NULL) {
    freopen("in", "r", stdin);
    freopen("out", "w", stdout);
  }
  return 0;
}
