Submission #891260


Source Code Expand

#include<iostream>
#include<cstring>
#include<algorithm>
#include<vector>
#include<queue>

using namespace std;

int main(){
  int n;
  cin>>n;
  int a[n];
  for(int i = 0;i<n;i++){
    cin>>a[i];
  }
  int ans = 0;
  for(int i = 0;i<n;i++){
    if(a[a[i]-1] == i+1)
      ans++;
  }
  cout<<ans/2<<endl;
  return 0;
}

Submission Info

Submission Time
Task B - Friendly Rabbits
User rain528
Language C++14 (GCC 5.4.1)
Score 200
Code Size 342 Byte
Status AC
Exec Time 35 ms
Memory 640 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 200 / 200
Status
AC × 3
AC × 15
Set Name Test Cases
Sample 0_00.txt, 0_01.txt, 0_02.txt
All 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt
Case Name Status Exec Time Memory
0_00.txt AC 3 ms 256 KB
0_01.txt AC 2 ms 256 KB
0_02.txt AC 3 ms 256 KB
1_00.txt AC 3 ms 256 KB
1_01.txt AC 35 ms 640 KB
1_02.txt AC 35 ms 640 KB
1_03.txt AC 35 ms 640 KB
1_04.txt AC 35 ms 640 KB
1_05.txt AC 35 ms 640 KB
1_06.txt AC 35 ms 640 KB
1_07.txt AC 35 ms 640 KB
1_08.txt AC 15 ms 384 KB
1_09.txt AC 29 ms 512 KB
1_10.txt AC 25 ms 512 KB
1_11.txt AC 8 ms 256 KB