Submission #1299538

#	Time	Username	Problem	Language	Result	Execution time	Memory
1299538		wojtekmal	Balloons (CEOI11_bal)	C++20	100 / 100	113 ms	4408 KiB

bal

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

struct Ball
{
    double x, r;
};

int n;
vector<Ball> balls;

double expected_r(Ball a, double x)
{
    return (x - a.x) * (x - a.x) / (4 * a.r);
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout << fixed << setprecision(3);

    cin >> n;

    for (int i = 0; i < n; i++)
    {
        double x, r;
        cin >> x >> r;

        while (!balls.empty())
        {
            r = min(r, expected_r(balls.back(), x));

            if (r >= balls.back().r) balls.pop_back();
            else break;
        }
        
        cout << r << "\n";
        balls.push_back(Ball{x, r});
    }
}

• 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