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Submission #441024

# Submission time Handle Problem Language Result Execution time Memory
441024 2021-07-03T23:09:00 Z penguinhacker Balloons (CEOI11_bal) C++14
30 / 100
 215 ms 1944 KB 
#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
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB 2 numbers

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB 53rd numbers differ - expected: '213.0000000000', found: '235.0000000000', error = '22.0000000000'

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 332 KB 2000 numbers

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 26 ms 384 KB 4165th numbers differ - expected: '463.3780000000', found: '468.0000000000', error = '4.6220000000'

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 63 ms 1024 KB 26317th numbers differ - expected: '1.1140000000', found: '16.4820000000', error = '15.3680000000'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 116 ms 1372 KB 7458th numbers differ - expected: '1.9040000000', found: '8.0000000000', error = '6.0960000000'

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 131 ms 1636 KB 4889th numbers differ - expected: '0.7110000000', found: '8.0000000000', error = '7.2890000000'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 184 ms 1844 KB 40692nd numbers differ - expected: '5543.6460000000', found: '5559.0000000000', error = '15.3540000000'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 215 ms 1944 KB 4263rd numbers differ - expected: '0.6980000000', found: '4.0000000000', error = '3.3020000000'
2 Halted 0 ms 0 KB -