Submission #890840

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Source Code Expand

#include<iostream>
#include<cmath>
#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
int A[110000],n;
int main(){
	scanf("%d",&n);
	for (int i=1;i<=n;i++) scanf("%d",&A[i]);
	int ans=0;
	for (int i=1;i<=n;i++)
		if (A[i]>i&&A[A[i]]==i) ans++;
	printf("%d\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:9:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:10:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  for (int i=1;i<=n;i++) scanf("%d",&A[i]);
                                          ^

Judge Result