Submission #1572377

---

Source Code Expand

 namespace std;

int main(){
int N,a[100001];
cin>>N;
for(int i=1;i<N+1;i++){
  cin>>a[i];
}

int count,b;
for(int i=1;i<N+1;i++){
   b=a[i];
   if(i==a[b]){count++;}
}
cout<<count/2;



return 0;
}

Submission Info

Compile Error

./Main.cpp:1:15: error: expected ‘{’ before ‘;’ token
  namespace std;
               ^
./Main.cpp: In function ‘int std::main()’:
./Main.cpp:5:1: error: ‘cin’ was not declared in this scope
 cin>>N;
 ^
./Main.cpp:15:1: error: ‘cout’ was not declared in this scope
 cout<<count/2;
 ^
./Main.cpp: At global scope:
./Main.cpp:20:1: error: expected ‘}’ at end of input
 }
 ^