제출 #28494

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
28494		탕탕탕! 핑거팁 니 맘을 겨눌게~ (#68)	포도주 시음 (FXCUP2_wine)	C11	0 / 1	6 ms	65536 KiB

wine

#include <stdio.h>

int N, K;

void merge_sort(int array[], int left, int right);
void merge(int num[], int left, int mid, int right);

void merge_sort(int array[], int left, int right)
{
	int mid;
	if (left < right) {
		mid = (left + right) / 2;

		merge_sort(array, left, mid);
		merge_sort(array, mid + 1, right);
		merge(array, left, mid, right);
	}
}

void merge(int array[], int left, int mid, int right)
{
	int i, j, k, m;
	i = left;
	j = mid + 1;
	k = left;
	int *tempArray;
	tempArray = (int*)malloc(sizeof(int)*N);
	while (i <= mid && j <= right) {
		if (array[i] < array[j]) {
			tempArray[k] = array[i];
			i++;
		}
		else {
			tempArray[k] = array[j];
			j++;
		}
		k++;
	}

	if (i > mid) {
		for (m = j; m <= right; m++) {
			tempArray[k] = array[m];
			k++;
		}
	}
	else {
		for (m = i; m <= mid; m++) {
			tempArray[k] = array[m];
			k++;
		}
	}
		for (m = left; m <= right; m++) {
			array[m] = tempArray[m];
		}
	}

int main()
{
	int i, j = 1, k = 1;
	long long result = 0;
	int temp = 0, prev = 0;
	int *arr;
	scanf("%d %d", &N, &K);
	arr = (int*)malloc(sizeof(int)*N);
	for (i = 0; i < N; i++) {
		scanf("%d", &arr[i]);
	}
	merge_sort(arr, 0, N - 1);
	for (i = 1; i <= K; i++) {
		if (i % 2 == 1) {
			if (i == 1) {
				temp = arr[N - i];
				result += temp;
			}
			else {
				temp = arr[N - i + k];
				result += temp - prev;
				k++;
			}
		}
		else {
			prev = arr[i - (j + 1)];
			j++;
		}
	}
	printf("%lld", result);
}

컴파일 시 표준 에러 (stderr) 메시지

wine.c: In function 'merge':
wine.c:27:20: warning: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
  tempArray = (int*)malloc(sizeof(int)*N);
                    ^
wine.c:27:20: warning: incompatible implicit declaration of built-in function 'malloc'
wine.c:27:20: note: include '<stdlib.h>' or provide a declaration of 'malloc'
wine.c: In function 'main':
wine.c:64:14: warning: incompatible implicit declaration of built-in function 'malloc'
  arr = (int*)malloc(sizeof(int)*N);
              ^
wine.c:64:14: note: include '<stdlib.h>' or provide a declaration of 'malloc'
wine.c:63:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &N, &K);
  ^
wine.c:66:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &arr[i]);
   ^

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