Submission #890769
Source Code Expand
#include<bits/stdc++.h> using namespace std; struct cww{cww(){ios::sync_with_stdio(false);cin.tie(0);}}init; typedef long long LL; template<typename T>void chmin(T &a,T b){a=min(a,b);} template<typename T>void chmax(T &a,T b){a=max(a,b);} template<typename T> istream& operator>>(istream &is,vector<T> &v){ for(auto &it:v)is>>it; return is; } int main(){ int N;cin>>N; vector<int> a(N); cin>>a; int res=0; for(int i=0;i<N;i++) if(a[a[i]-1]-1==i)res++; cout<<res/2<<endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | btk15049 |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 558 Byte |
Status | AC |
Exec Time | 11 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 | 2 ms | 256 KB |
0_02.txt | AC | 2 ms | 256 KB |
1_00.txt | AC | 3 ms | 256 KB |
1_01.txt | AC | 11 ms | 640 KB |
1_02.txt | AC | 11 ms | 640 KB |
1_03.txt | AC | 11 ms | 640 KB |
1_04.txt | AC | 11 ms | 640 KB |
1_05.txt | AC | 11 ms | 640 KB |
1_06.txt | AC | 11 ms | 640 KB |
1_07.txt | AC | 11 ms | 640 KB |
1_08.txt | AC | 6 ms | 384 KB |
1_09.txt | AC | 9 ms | 640 KB |
1_10.txt | AC | 8 ms | 512 KB |
1_11.txt | AC | 4 ms | 384 KB |