Submission #891089

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
int n,i,r,a[100100];
int main() {
  scanf("%d",&n);
  for (i=1; i<=n; i++) scanf("%d",&a[i]);
  for (i=1; i<=n; i++) if (a[a[i]]==i) r++;
  printf("%d\n",r/2);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:5:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
                 ^
./Main.cpp:6:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   for (i=1; i<=n; i++) scanf("%d",&a[i]);
                                         ^

Judge Result