Submission #441024

#	Time	Username	Problem	Language	Result	Execution time	Memory
441024		penguinhacker	Balloons (CEOI11_bal)	C++14	30 / 100	215 ms	1944 KiB

bal

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

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout << fixed << setprecision(3);
	int n;
	cin >> n;
	vector<pair<int, double>> v;
	while(n--) {
		int x;
		double r;
		cin >> x >> r;
		auto d=[x](pair<int, double> p) {
			double dx=x-p.first;
			return dx*dx/(4*p.second);
		};
		while(v.size()>=2&&d(v.end()[-1])>=d(v.end()[-2]))
			v.pop_back();
		double h=v.size()?min(r, d(v.back())):r;
		cout << h << "\n";
		while(v.size()&&h>=v.back().second)
			v.pop_back();
		v.emplace_back(x, h);
	}
	return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 10 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10