Submission #446964

#	Time	Username	Problem	Language	Result	Execution time	Memory
446964		maximath_1	Balloons (CEOI11_bal)	C++11	100 / 100	569 ms	5528 KiB

bal

#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 / 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