Submission #706512

#	Time	Username	Problem	Language	Result	Execution time	Memory
706512		mychecksedad	Sure Bet (CEOI17_sure)	C++17	100 / 100	77 ms	3576 KiB

sure

/* Author : Mychecksdead */
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
#define MOD (1000000000+7)
#define MOD1 (998244353)
#define PI 3.1415926535
#define pb push_back
#define all(x) x.begin(), x.end()
const int N = 1e6+100, M = 1e5+10, K = 20;

int n;
double a[N], b[N];
void solve(){
  cin >> n;
  for(int i = 0; i < n; ++i) cin >> a[i] >> b[i];
  sort(a, a+n, greater<double>());
  sort(b, b+n, greater<double>());

  double best = 0, x = 0, y = 0, s = 0;
  int j = 0;
  for(int i = 0; i < n; ++i){
    x += a[i];
    s += 1;
    while(j < n && min(x, y + b[j]) - s - 1 >= min(x, y) - s){
      y += b[j];
      s += 1;
      best = max(best, min(x, y) - s);
      j++;
    }  
    best = max(best, min(x, y) - s);
  }
  cout << fixed << setprecision(4);
  cout << best;
}


int main(){
  cin.tie(0); ios::sync_with_stdio(0);
  int T = 1, aa;
  // cin >> T;aa=T;
  while(T--){
    // cout << "Case #" << aa-T << ": ";
    solve();
    cout << '\n';
  }
  return 0;
 
}

Compilation message (stderr)

sure.cpp: In function 'int main()':
sure.cpp:40:14: warning: unused variable 'aa' [-Wunused-variable]
   40 |   int T = 1, aa;
      |              ^~

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