Submission #1020037

#	Time	Username	Problem	Language	Result	Execution time	Memory
1020037		julia_08	Balloons (CEOI11_bal)	C++17	100 / 100	149 ms	5528 KiB

bal

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

using ld = long double;

ld solve(ld x1, ld x2, ld r2){
  return ((x2 - x1)*(x2 - x1))/(4*r2);
}

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

  int n; cin >> n;

  stack<pair<ld, ld>> q;

  for(int i=1; i<=n; i++){
    ld x, r; cin >> x >> r;
    while(!q.empty()){
      r = min(r, solve(x, q.top().first, q.top().second));

      if(q.top().second > r) break;
      q.pop();
    }

    cout << fixed << setprecision(3) << r << "\n";
    q.push({x, r});
  }

  return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10