제출 #28485

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
28485		핑응핑응 홍신정 (#68)	포도주 시음 (FXCUP2_wine)	C11	1 / 1	109 ms	5804 KiB

wine

#include <stdio.h>

long long int t[300000];
long long int temp[300000];

void merge(long long int A[], int low, int high) {

	int mid = (low + high) / 2;
	int i = low, j = mid + 1, k = low;

	while (i <= mid && j <= high) {
		if (A[i]<A[j]) {
			temp[k++] = A[i++];
		}
		else {
			temp[k++] = A[j++];
		}
	}

	for (; i <= mid; i++) {
		temp[k++] = A[i];
	}
	for (; j <= high; j++) {
		temp[k++] = A[j];
	}
	for (i = low; i <= high; i++)
		A[i] = temp[i];
}

void mergesort(long long int A[], int low, int high) {
	int mid = (low + high) / 2;

	if (high>low) {
		mergesort(A, low, mid);
		mergesort(A, mid + 1, high);
		merge(A, low, high);
	}
}

int main() {
	int num, k, i;
	int start = 0, end;
	long long int flavor = 0, tmp=0;
	int flag = 1;

	scanf("%d %d", &num, &k);
	
	for (i = 0; i < num; i++) {
		scanf("%lld", &t[i]);
	}

	mergesort(t, 0, num - 1);

	end = num-1;
	while (k--) {
		if (flag == 1) {
			flavor += (t[end--]-tmp);
			flag = 0;
		}
		else {
			tmp = t[start++];
			flag = 1;
		}
	}

	printf("%lld", flavor);

	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

wine.c: In function 'main':
wine.c:46:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &num, &k);
  ^
wine.c:49:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld", &t[i]);
   ^

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