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Submission #446964

# Submission time Handle Problem Language Result Execution time Memory
446964 2021-07-24T05:48:57 Z maximath_1 Balloons (CEOI11_bal) C++11
100 / 100
 569 ms 5528 KB 
#include <iostream>
#include <math.h>
#include <stack>
#include <iomanip>
using namespace std;

#define ld long double

const int MX = 2e5 + 5;
const ld eps = 1e-10;

int n;

struct ball{
	int ps;
	ld r;
};
stack<ball> s;

int main(){
	cin.tie(0) -> sync_with_stdio(0);

	cin >> n;
	
	for(int p, r, i = 0; i < n; i ++){
		cin >> p >> r;

		ld mxR = r;
		while(!s.empty()){
			ld c = (s.top().ps - p) * 1.0L * (s.top().ps - p);
			mxR = min(mxR, c / (4.0L * s.top().r));

			if(mxR > s.top().r - eps)
				s.pop();
			else
				break;
		}

		cout << fixed << setprecision(3) << mxR << endl;
		s.push((ball){p, mxR});
	}

	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
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 204 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 332 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 696 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 135 ms 1700 KB 50000 numbers
2 Correct 134 ms 1620 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 277 ms 2844 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 325 ms 3240 KB 115362 numbers
2 Correct 298 ms 3396 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 441 ms 4036 KB 154271 numbers
2 Correct 494 ms 5528 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 569 ms 4572 KB 200000 numbers
2 Correct 515 ms 5456 KB 199945 numbers