Submission #900418

Source Code Expand

#include <bits/stdc++.h>
#define  rep(i,n) for(int i=0;i<n;i++)
using namespace std;
typedef vector<int> vi;
typedef long int li;
typedef unsigned long long ull;

int main(int argc,char* argv[])
{
    int N, ans=0;
    cin >> N;
    vi a(N);
    rep(i,N) cin >> a[i];
    rep(i,N) if(a[a[i]-1]==i+1) ans++;
    cout<< ans/2 <<endl;
    return 0;
}

Submission Info

Submission Time
Task B - Friendly Rabbits
User misaki
Language C++14 (GCC 5.4.1)
Score 200
Code Size 363 Byte
Status AC
Exec Time 32 ms
Memory 640 KiB

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 2 ms 256 KiB
0_01.txt AC 2 ms 256 KiB
0_02.txt AC 2 ms 256 KiB
1_00.txt AC 2 ms 256 KiB
1_01.txt AC 30 ms 640 KiB
1_02.txt AC 30 ms 640 KiB
1_03.txt AC 30 ms 640 KiB
1_04.txt AC 31 ms 640 KiB
1_05.txt AC 30 ms 640 KiB
1_06.txt AC 30 ms 640 KiB
1_07.txt AC 32 ms 640 KiB
1_08.txt AC 13 ms 384 KiB
1_09.txt AC 25 ms 512 KiB
1_10.txt AC 22 ms 512 KiB
1_11.txt AC 7 ms 256 KiB