Submission #549591

#	Time	Username	Problem	Language	Result	Execution time	Memory
549591		Jomnoi	Balloons (CEOI11_bal)	C++17	100 / 100	223 ms	5436 KiB

bal

#include <bits/stdc++.h>
#define DEBUG 0
using namespace std;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    int n;
    cin >> n;
    stack <pair <double, double>> stk;
    for(int i = 1; i <= n; i++) {
        double x, r, nr;
        cin >> x >> r;
        
        while(!stk.empty() and (r = min(r, (stk.top().first - x) * (stk.top().first - x) / (4 * stk.top().second))) >= stk.top().second) {
            stk.pop();
        }
        stk.emplace(x, r);
        
        cout << fixed << setprecision(3) << r << '\n';
    }
    return 0;
}

Compilation message (stderr)

bal.cpp: In function 'int main()':
bal.cpp:11:22: warning: unused variable 'nr' [-Wunused-variable]
   11 |         double x, r, nr;
      |                      ^~

• 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