제출 #537929

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
537929		theysoldtheworld	Sure Bet (CEOI17_sure)	C++14	100 / 100	102 ms	5032 KiB

sure

#include <bits/stdc++.h>
 
using namespace std;
 
double Get(vector<double> a , vector<double> b) {
  int n = (int)a.size();
  double h = 0 , t = 0;
  double ans = 0;
  int id = 0;
  for (int i = 0 ; i < n ; i++) {
    h += a[i];
    double new_t = t - 1;
    int add = 0;
    double cur = min(h , new_t);
    while (id < n && min(h - (add + 1) , new_t + b[id]) > cur) {
      add += 1;
      new_t += b[id];
      cur = min(h - add , new_t);
      id += 1;
    }
    h -= add;
    t = new_t;
    ans = max(ans , min(h , t));
  }
  return ans;
}
 
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  vector<double> a(n) , b(n);
  for (int i = 0 ; i < n ; i++) {
    cin >> a[i] >> b[i];
    a[i] -= 1; 
    b[i] -= 1;
  }
  sort(a.rbegin() , a.rend());
  sort(b.rbegin() , b.rend());
  double ans = max(Get(a , b) , Get(b , a));
  cout << fixed << setprecision(4) << ans << '\n';
  return 0; 
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40