Submission #772106

#	Time	Username	Problem	Language	Result	Execution time	Memory
772106		NK_	Balloons (CEOI11_bal)	C++17	100 / 100	148 ms	3428 KiB

bal

// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>

using namespace std;

#define nl '\n'

using ld = long double;

const ld eps = 1e-9;

int main() {
	cin.tie(0)->sync_with_stdio(0);
	
	cout << fixed << setprecision(10);
	int N; cin >> N;

	vector<pair<int, ld>> A;

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

		ld ans = r;
		while(size(A)) {
			ld D = ld(x - A.back().first) * ld(x - A.back().first);
			ld R = min(ld(r), D / (4 * A.back().second));
			if ((ans - R) > eps) ans = R;
			// cout << ans - R << " - " << x << endl;

			if (ans+eps > A.back().second) A.pop_back();
			else break;
		}

		cout << ans << nl;

		A.push_back({x, ans});
	}

    return 0;
}

• 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