Submission #846551

#	Time	Username	Problem	Language	Result	Execution time	Memory
846551		QwertyPi	Sure Bet (CEOI17_sure)	C++14	100 / 100	112 ms	5428 KiB

sure

#include <bits/stdc++.h>
 
using namespace std;
 
int32_t main(){
  int n; cin >> n;
  vector<double> a, b;
  
  for(int i = 0; i < n; i++){
      double u, v; cin >> u >> v;
      a.push_back(u); b.push_back(v);
  }
  
  sort(a.begin(), a.end(), [](double x, double y){ return x > y; });
  sort(b.begin(), b.end(), [](double x, double y){ return x > y; });
  
  vector<double> sa(n + 1), sb(n + 1);
  for(int i = 0; i < n; i++) sa[i + 1] = sa[i] + a[i];
  for(int i = 0; i < n; i++) sb[i + 1] = sb[i] + b[i];
  
  int L = 0, R = 0;
  double ans = 0;
  while(L < n || R < n){
    if(R == n || L < n && sa[L] < sb[R]) L++;
    else R++;
    ans = max(ans, min(sa[L], sb[R]) - (L + R));
  }
  cout << fixed << setprecision(4) << ans << endl;
}

Compilation message (stderr)

sure.cpp: In function 'int32_t main()':
sure.cpp:24:24: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   24 |     if(R == n || L < n && sa[L] < sb[R]) L++;

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