Submission #28282329

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Source Code Expand

/*
 * Author: nskybytskyi
 * Time:   2022-01-01 15:47:49
 */

#include <bits/stdc++.h>
using namespace std;

int main() {
  cin.tie(0)->sync_with_stdio(0);

  int n;
  cin >> n;

  vector<pair<int, int>> ab(n);
  for (auto& [a, b] : ab) {
    cin >> a >> b;
  }

  bool eq = true;
  for (auto [a, b] : ab) {
    if (a != b) {
      eq = false;
    }
  }

  if (eq) {
    cout << 0 << "\n";
  } else {
    int64_t sum = 0;
    for (auto [a, _] : ab) {
      sum += a;
    }

    int mn = numeric_limits<int>::max();
    for (auto [a, b] : ab) {
      if (b < a) {
        mn = min(mn, b);
      }
    }

    cout << sum - mn << "\n";
  }

  return 0;
}

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