Submission #8585221

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0), cout.tie(0);

  int m;
  cin >> m;
  vector<int> d(m);
  vector<long long> c(m);
  long long ans = 0, s = 0;
  for (int i = 0; i < m; ++i) {
    cin >> d[i] >> c[i];
    ans += c[i];
    s += c[i] * d[i];
  }
  cout << ans -  1 + (s - 1) / 9;

  return 0;
}

Submission Info

Judge Result