제출 #115344

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
115344		model_code	Balloons (CEOI11_bal)	C++17	50 / 100	2057 ms	1772 KiB

bal

/* Slow solution for the task BAL (Balloons)
 * Author: Jakub Pachocki
 * O(n^2) time solution
 */

#include <cstdio>
#include <algorithm>

using namespace std;

struct Balloon {
	int x;
	long double radius;
};

long double sq(long double x) {
	return x * x;
}

Balloon s[200000];
int ss;

int n;

int main() {
	scanf("%d", &n);
	for (int i = 0; i < n; ++i) {
		int pos;
		scanf("%d", &pos);
		int size;
		scanf("%d", &size);
		long double maxRadius = size;
		for (int j = ss - 1; j >= 0; --j) {
			long double c = sq(s[j].x - pos);
			maxRadius = min(maxRadius, c / (4 * s[j].radius));
		}
		printf("%.3Lf\n", maxRadius);
		s[ss].x = pos;
		s[ss].radius = maxRadius;
		++ss;
	}
}

컴파일 시 표준 에러 (stderr) 메시지

bal.cpp: In function 'int main()':
bal.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
bal.cpp:29:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &pos);
   ~~~~~^~~~~~~~~~~~
bal.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &size);
   ~~~~~^~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10