Submission #1354915

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Source Code Expand

#include<stdio.h>
int main(){
	int n,i,a,b[100010]={};
	scanf("%d",&n);
	for(i=0;i<n;i++){
		scanf("%d",&a);
		b[a]++;
	}
	if(n%2)b[0]++;
		for(i=0;i<n;i++){//printf("%d %d %d\n",i,i%2==n%2?0:2,b[i]);
		if((i%2==n%2?0:2)-b[i])break;
	}
	printf("%d\n",i-n?0:1<<n/2);
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:4:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^
./Main.c:6:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&a);
   ^

Judge Result