제출 #1135325

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1135325		ramzialoulou	Let's Win the Election (JOI22_ho_t3)	C++20	0 / 100	0 ms	328 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#ifdef Ramzi
#include "debug.h"
#else
#define debug(...)
#endif

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, k;
  cin >> n >> k;
  vector<pair<int, int>> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i].second >> a[i].first;
  }
  sort(a.begin(), a.end());
  multiset<pair<int, int>> se(a.begin(), a.end());
  double ans = 0;
  int x = 0;
  for (auto [f, s] : a) {
    if (f != -1) {
      ans += f;
      x += 1;
      se.erase(se.find({f, s}));
      break;
    }
  }
  double sum = 0;
  for (auto [f, s] : se) {
    sum += s;
  }
  ans += sum / (x + 1);
  cout << fixed << setprecision(10) << ans << "\n";
  return 0;
}

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