제출 #51382

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
51382		adamczh1	Sure Bet (CEOI17_sure)	C++17	0 / 100	3 ms	460 KiB

sure

#include <bits/stdc++.h>
using namespace std;

const int MAXN = 1e5 + 5;

int n;
double a[MAXN], b[MAXN];

int main() {
	scanf("%d", &n);
	for (int i = 0; i < n; i++) {
		scanf("%lf %lf", &a[i], &b[i]);
	}
	sort(a, a + n);
	reverse(a, a + n);
	sort(b, b + n);
	reverse(b, b + n);
	double lo = 0;
	double hi = 2e9;
	for (int iter = 0; iter < 100; iter++) {
		double mid = (lo + hi) / 2;
		double x = 0, y = 0;
		for (int i = 0; i < n; i++) {
			if (x < mid) {
				x += a[i] - 1;
				y--;
			}
			if (y < mid) {
				x--;
				y += b[i] - 1;
			}
		}
		if (x >= mid && y >= mid) {
			lo = mid;
		} else {
			hi = mid;
		}
	}
	printf("%.4lf", lo);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

sure.cpp: In function 'int main()':
sure.cpp:10:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
sure.cpp:12:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf %lf", &a[i], &b[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40