Submission #891392


Source Code Expand

#include <map>
#include <cmath>
#include <vector>
#include <string>
#include <iostream>
#include <algorithm>
using namespace std;

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

Submission Info

Submission Time
Task B - Friendly Rabbits
User toe42vbnys
Language C++14 (GCC 5.4.1)
Score 200
Code Size 406 Byte
Status AC
Exec Time 31 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 2 ms 256 KB
0_02.txt AC 2 ms 256 KB
1_00.txt AC 2 ms 256 KB
1_01.txt AC 31 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 6 ms 256 KB