Submission #471341

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Source Code Expand

#include <stdio.h>
#include <stdlib.h>

void q_sort(int [],int size);
int q_sort_func(const void*,const void*);

int main(){
	int N;
	int D[100000];
	int i, j, k, l;
	long count = 0;
	int ans;

	scanf("%d", &N);
	for (i = 0; i < N; i++){
		scanf("%d", &D[i]);
	}

	q_sort(D,N);

	for (i = 0; i < N; i++)
	{
		for (j = i+1; j < N; j++)
		{
			if (D[i] * 2 <= D[j])
			{
				for (k = j+1; k < N; k++)
				{
					if (D[j] * 2 <= D[k])
					{
						for (l = k+1; l < N; l++)
						{
							if (D[k] * 2 <= D[l]){
								count++;
							}
						}
					}
				}
			}
		}
	}
	ans = (int)count % 1000000007;

	printf("%d\n", (int)count);


	return 0;
}


void q_sort(int array[], int size){
	qsort((void *)array, size, sizeof(array[0]), q_sort_func);
}

int q_sort_func(const void* a, const void* b){
	if (*(int *)a < *(int *)b) {//昇順ソート　(降順ソートなら不等号を逆に)
		return -1;
	}
	else
		if (*(int *)a == *(int *)b) {
			return 0;
		}
	return 1;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:14:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &N);
  ^
./Main.c:16:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &D[i]);
   ^

Judge Result