제출 #28712

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
28712		탕탕탕! 핑거팁 니 맘을 겨눌게~ (#68)	포도주 시음 (FXCUP2_wine)	C11	0 / 1	1000 ms	1508 KiB

wine

#include <stdio.h>

void swap(int num1, int num2)
{
	int temp = num1;
	num1 = num2;
	num2 = temp;
}
void q_sort(int numbers[], int left, int right)
{
	int pivot, l_hold, r_hold, median;
	l_hold = left;
	r_hold = right;

	median = (left + right) / 2;
	swap(numbers[left], numbers[median]);
	pivot = numbers[left];
	while (left < right)
	{
		while ((numbers[right] >= pivot) && (left < right))
			right--;
		if (left != right)
		{
			numbers[left] = numbers[right];
		}
		while ((numbers[left] <= pivot) && (left < right))
			left++;

		if (left != right)
		{
			numbers[right] = numbers[left];
			right--;
		}
	}
	numbers[left] = pivot;
	pivot = left;
	left = l_hold;
	right = r_hold;

	if (left < pivot)
		q_sort(numbers, left, pivot - 1);
	if (right > pivot)
		q_sort(numbers, pivot + 1, right);
}
void QuickSort(int numbers[], int array_size)
{
	q_sort(numbers, 0, array_size - 1);
}

int main() {
	int N, K, i, first = 0, end = 1;
	int *wine;
	long long int flavor = 0;
	scanf("%d %d", &N, &K);
	wine = (int*)malloc(sizeof(int)*N + 1);
	for (i = 0; i < N; i++)
		scanf("%d", &wine[i]);
	QuickSort(wine, N);
	for (i = 0; i < K; i = i + 2) {
		if (i == 0) {
			flavor = wine[N - end];
			end++;
			continue;
		}
		flavor += wine[N - end] - wine[0 + first];
		end++;
		first++;
	}
	printf("%lld", flavor);
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

wine.c: In function 'main':
wine.c:55:15: warning: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
  wine = (int*)malloc(sizeof(int)*N + 1);
               ^
wine.c:55:15: warning: incompatible implicit declaration of built-in function 'malloc'
wine.c:55:15: note: include '<stdlib.h>' or provide a declaration of 'malloc'
wine.c:54:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &N, &K);
  ^
wine.c:57:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &wine[i]);
   ^

• Subtask 1: 0 / 1