제출 #51388

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
51388		adamczh1	Sure Bet (CEOI17_sure)	C++17	100 / 100	101 ms	12808 KiB

sure

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

const int MAXN = 1e5 + 5;

int n;
double a[MAXN], b[MAXN];
ll A[MAXN], B[MAXN];

int main() {
	scanf("%d", &n);
	for (int i = 0; i < n; i++) {
		scanf("%lf %lf", &a[i], &b[i]);
		A[i] = round(a[i] * 10000);
		B[i] = round(b[i] * 10000);
	}
	sort(A, A + n);
	reverse(A, A + n);
	sort(B, B + n);
	reverse(B, B + n);
	ll lo = 0;
	ll hi = 1e18;
	while (lo < hi) {
		ll mid = (lo + hi + 1) / 2;
		ll x = 0, y = 0;
		int ai = 0, bi = 0;
		while (ai < n || bi < n) {
			if (x < mid && ai < n) {
				x += A[ai++] - 10000;
				y -= 10000;
				continue;
			}
			if (y < mid && bi < n) {
				x -= 10000;
				y += B[bi++] - 10000;
				continue;
			}
			break;
		}
		if (x >= mid && y >= mid) {
			lo = mid;
		} else {
			hi = mid - 1;
		}
	}
	printf("%.4lf", 0.0001 * lo);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

sure.cpp: In function 'int main()':
sure.cpp:12:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
sure.cpp:14:8: 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: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40