Submission #891191

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Source Code Expand

#include <stdio.h>

int main(void) {
	int i;
	int n, a[100000];
	int cnt;

	scanf("%d", &n);
	for (i = 0; i < n; i++) {
		scanf("%d", a + i);
		a[i]--;
	}

	cnt = 0;
	for (i = 0; i < n; i++)
		cnt += i == a[a[i]];

	printf("%d\n", cnt / 2);

	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:8:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ^
./Main.c:10:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", a + i);
   ^

Judge Result