Submission #891321
Source Code Expand
#include <bits/stdc++.h> using namespace std; #define fi first #define se second #define repl(i,a,b) for(int i=(int)(a);i<(int)(b);i++) #define rep(i,n) repl(i,0,n) #define each(itr,v) for(auto itr:v) #define pb(s) push_back(s) #define mp(a,b) make_pair(a,b) #define all(x) (x).begin(),(x).end() #define dbg(x) cout<<#x"="<<x<<endl #define maxch(x,y) x=max(x,y) #define minch(x,y) x=min(x,y) #define uni(x) x.erase(unique(all(x)),x.end()) #define exist(x,y) (find(all(x),y)!=x.end()) #define bcnt(x) bitset<32>(x).count() typedef long long ll; typedef unsigned long long ull; typedef pair<int, int> P; typedef pair<P, int> PPI; typedef pair<ll, ll> PL; typedef pair<P, ll> PPL; #define INF INT_MAX/3 #define MAX_N 1000 int n; int a[111111]; int main(){ cin.sync_with_stdio(false); cin>>n; rep(i,n){ cin>>a[i]; a[i]--; } int res=0; rep(v,n){ if(v==a[a[v]])res++; } cout<<res/2<<endl; return 0; }
Submission Info
Submission Time | |
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Task | B - Friendly Rabbits |
User | yamad |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 959 Byte |
Status | AC |
Exec Time | 11 ms |
Memory | 640 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 200 / 200 | ||||
Status |
|
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Set Name | Test Cases |
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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 | 3 ms | 384 KB |
1_00.txt | AC | 2 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 | 10 ms | 640 KB |
1_10.txt | AC | 9 ms | 512 KB |
1_11.txt | AC | 4 ms | 384 KB |