Submission #890789


Source Code Expand

#include<bits/stdc++.h>

using namespace std;

int main() {
	int N;
	cin >> N;
	vector<int>D( N );
	for( size_t i = 0; i < N; i++ ) {
		cin >> D[i];
		D[i]--;
	}
	int ans = 0;
	for( size_t i = 0; i < N; i++ ) {
		if( D[D[i]] == i ) {
			ans++;
		}
	}
	cout << ans / 2 << endl;
}

Submission Info

Submission Time
Task B - Friendly Rabbits
User goryudyuma
Language C++14 (GCC 5.4.1)
Score 200
Code Size 299 Byte
Status AC
Exec Time 30 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 2 ms 256 KB
0_01.txt AC 3 ms 256 KB
0_02.txt AC 22 ms 384 KB
1_00.txt AC 2 ms 256 KB
1_01.txt AC 30 ms 640 KB
1_02.txt AC 30 ms 640 KB
1_03.txt AC 30 ms 640 KB
1_04.txt AC 30 ms 640 KB
1_05.txt AC 30 ms 640 KB
1_06.txt AC 30 ms 640 KB
1_07.txt AC 30 ms 640 KB
1_08.txt AC 12 ms 384 KB
1_09.txt AC 25 ms 512 KB
1_10.txt AC 21 ms 512 KB
1_11.txt AC 7 ms 256 KB