Submission #898632

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Source Code Expand

#include <stdio.h>

int main (void){
	int N;
	scanf("%d",&N);
	int a[N];
	int result = 0;
	for(int i = 0; i < N; i++){
		scanf("%d",&a[i]);
	}
	for(int i = 0; i < N; i++){
		if(a[i] == i+1){
			continue;
		}
		int j = a[i] - 1;
		if(a[j] == i+1){
			a[i] = 0;
			a[j] = 0;
			result++;
		}
			
	}
	printf("%d\n",result);
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:5:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&N);
  ^
./Main.c:9:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a[i]);
   ^

Judge Result