Submission #891093

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Source Code Expand

#include <stdio.h>
#include <algorithm>
#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <string.h>
#include <string>
#include <queue>
#include <stack>
using namespace std;
typedef long long int ll;
int you[111111];
int vis[111111];
int n, ans;
int main(void)
{
	cin>>n;
	for(int i=1 ; i<=n ; i++)
	{
		scanf("%d",&you[i]);
	}
	for(int i=1 ; i<=n ; i++)
	{
		if(vis[you[i]]==0 && you[you[i]]==i)
		{
			ans++;
			vis[you[i]]=1;
			vis[i]=1;
		}
		vis[i]=1;
	}
	cout<<ans<<endl;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:24:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&you[i]);
                      ^

Judge Result