Submission #1363675

#	Time	Username	Problem	Language	Result	Execution time	Memory
1363675		vjudge1	Balloons (CEOI11_bal)	C++20	100 / 100	232 ms	1848 KiB

bal

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

double f(pair<double, double> a, double bx) {
	return (a.first - bx) * (a.first - bx) / (4 * a.second);
}

int main() {
	int n;
	cin >> n;

	stack<pair<double, double>> st;

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

		double res = r;
		while (!st.empty()) {
			pair<double, double> last = st.top();
			double fr = f(last, x);
			res = min(res, fr);
			if (res >= last.second) {
				st.pop();
				continue;
			}
			else {
				break;
			}
		}
		st.push({x, res});
		cout << fixed << setprecision(3) << res << endl;
	}
}

• 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