Submission #748637

#	Time	Username	Problem	Language	Result	Execution time	Memory
748637		TAhmed33	Balloons (CEOI11_bal)	C++98	100 / 100	363 ms	16020 KiB

bal

#include <bits/stdc++.h>
using namespace std;
#define ld long double
ld calc (pair <ld, ld> x, ld a) {
	return (a - x.first) * (a - x.first) / (4 * x.second);
}
int main () {
	cout << fixed << setprecision(9);
	int n;
	cin >> n;
	ld arr[n][2] = {};
	for (int i = 0; i < n; i++) cin >> arr[i][0] >> arr[i][1];
	stack <pair <ld, ld>> cur;
	ld ans[n];
	ans[0] = arr[0][1];
	cur.push({arr[0][0], ans[0]});
	for (int i = 1; i < n; i++) {
		ans[i] = arr[i][1];
		while (!cur.empty()) {
			auto k = cur.top();
			ans[i] = min(ans[i], calc(k, arr[i][0]));
			if (k.second <= ans[i]) cur.pop();
			else break;
		}
		cur.push({arr[i][0], ans[i]});
	}
	for (int i = 0; i < n; i++) {
		cout << ans[i] << " ";
	}
	cout << '\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