Submission #770303

#	Time	Username	Problem	Language	Result	Execution time	Memory
770303		lukehsiao	Balloons (CEOI11_bal)	C++14	100 / 100	116 ms	5400 KiB

bal

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

const int mxN = 2e5;

int n;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);

	cin >> n;
	
	cout << fixed << setprecision(3);

	stack<pair<int, double>> st;
	for (int i=0, x, r; i<n; ++i) {
		cin >> x >> r;
		double mr = r;
		while (!st.empty()) {
			int tx = st.top().first;
			double tr = st.top().second;
			double dx = x - tx;
			mr = min(mr, dx * dx / (4 * tr));
			if (mr >= tr)
				st.pop();
			else
				break;
		}
		st.push({x, mr});
		cout << mr << '\n';
	}
}

• 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