#include <bits/stdc++.h>

using namespace std;

int main()
{
  int N, D, T[100], K[100];

  cin >> N >> D;
  assert(1 <= N && N <= 100);
  assert(1 <= D && D <= 10000000);

  for(int i = 0; i < N; i++) {
    cin >> T[i] >> K[i];
    assert(1 <= T[i] && T[i] <= 10000000);
    assert(1 <= K[i] && K[i] <= 10000000);
  }

}