Submission #890929
Source Code Expand
#include<bits/stdc++.h> #define REP(i,s,n) for(int i=s;i<n;i++) #define rep(i,n) REP(i,0,n) using namespace std; int main(){ int n; cin >> n; vector<int> vec(n); rep(i,n) { cin>> vec[i]; --vec[i]; } int cnt = 0; rep(i,n) { if( i == vec[vec[i]] ) { ++cnt; } } cout << (int)(cnt)/2 << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | ChiyomiAnzai |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 370 Byte |
Status | AC |
Exec Time | 31 ms |
Memory | 640 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 200 / 200 | ||||
Status |
|
|
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 | 3 ms | 256 KB |
0_02.txt | AC | 2 ms | 256 KB |
1_00.txt | AC | 3 ms | 384 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 | 13 ms | 384 KB |
1_09.txt | AC | 25 ms | 512 KB |
1_10.txt | AC | 22 ms | 512 KB |
1_11.txt | AC | 7 ms | 256 KB |