#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vp = vector<P>;
using vl = vector<ll>;
template <typename T>
void Yes(T flag) {
  cout << (flag ? "Yes" : "No") << endl;
}
template <typename T>
void pv(vector<T> vec) {
  cout << "[";
  for (auto& v : vec) {
    cout << v << ",";
  }
  cout << "]" << endl;
}
template <>
void pv(vector<P> vec) {
  cout << "[";
  for (auto& v : vec) {
    cout << "<" << v.first << "," << v.second << ">"
         << ",";
  }
  cout << "]" << endl;
}
int main() { return 0; }
