Submission #891663


Source Code Expand

#include <iostream>

#define reep(i,n,m) for(int i=(n);i<(m);i++)
#define rep(i,n) reep(i,0,n)

using namespace std;

int a[100000];

int main(){
	rep(i,100000){
		a[i] = -1;
	}
	int N;
	cin >> N;
	int ans=0;
	rep(i,N){
		int c;
		cin >> c;
		c--;
		if(a[c]==i){
			ans++;
		}
		a[i]=c;
	}
	cout << ans << endl;
}

Submission Info

Submission Time
Task B - Friendly Rabbits
User otama_jaccy
Language C++14 (GCC 5.4.1)
Score 200
Code Size 339 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 640 KB
0_01.txt AC 3 ms 640 KB
0_02.txt AC 3 ms 640 KB
1_00.txt AC 3 ms 640 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 640 KB
1_09.txt AC 29 ms 640 KB
1_10.txt AC 25 ms 640 KB
1_11.txt AC 8 ms 640 KB