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Submission #889550

# Submission time Handle Problem Language Result Execution time Memory
889550 2023-12-20T01:56:54 Z ilef Balloons (CEOI11_bal) C++14
100 / 100
 255 ms 7156 KB 
#include <bits/stdc++.h>
using namespace std;
const int PRECISION = 3;
double calc_r(pair<double, double> a, double bx) {
	return (a.first - bx) * (a.first - bx) / (4 * a.second);
}
int main() {
	int n;
	cin >> n;
	vector<double> final_radius(n);
	stack<pair<double, double>> to_check;
	for (int i = 0; i < n; i++) {
		double x, r;
		cin >> x >> r;
		double max_r = r;
		while (!to_check.empty()) {
			pair<double, double> last = to_check.top();
			double to_last_r = calc_r(last, x);
			max_r = min(max_r, to_last_r);
			if (max_r >= last.second) {
				to_check.pop();
				continue;
			}
			else {
				break;
			}
		}
		to_check.push({x, max_r});
		final_radius[i] = max_r;
	}
	cout << fixed << setprecision(PRECISION);
	for (double &r : final_radius) { cout << r << "\n"; }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 436 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 344 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 860 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 60 ms 1900 KB 50000 numbers
2 Correct 63 ms 2116 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 121 ms 3476 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 145 ms 4312 KB 115362 numbers
2 Correct 153 ms 4296 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 187 ms 5204 KB 154271 numbers
2 Correct 255 ms 6956 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 237 ms 6488 KB 200000 numbers
2 Correct 254 ms 7156 KB 199945 numbers