Submission #1161035
Source Code Expand
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef vector<int> VI; typedef vector<VI> VVI; typedef vector<ll> VL; typedef vector<VL> VVL; typedef pair<int, int> PII; #define FOR(i, a, n) for (ll i = (ll)a; i < (ll)n; ++i) #define REP(i, n) FOR(i, 0, n) #define ALL(x) x.begin(), x.end() #define MOD 1000000007 #define INF (1LL<<25) //33554432 #define PI 3.14159265359 #define EPS 1e-12 //#define int ll int a[100010]; signed main(void) { int n; cin >> n; REP(i, n) cin >> a[i]; int ret = 0; REP(i, n) { if(i == a[a[i]-1]-1) ret++; } cout << ret/2 << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | ferin_tech |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 656 Byte |
Status | AC |
Exec Time | 36 ms |
Memory | 640 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 200 / 200 | ||||
Status |
|
|
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 | 1 ms | 256 KB |
0_01.txt | AC | 1 ms | 256 KB |
0_02.txt | AC | 1 ms | 256 KB |
1_00.txt | AC | 1 ms | 256 KB |
1_01.txt | AC | 36 ms | 640 KB |
1_02.txt | AC | 36 ms | 640 KB |
1_03.txt | AC | 36 ms | 640 KB |
1_04.txt | AC | 36 ms | 640 KB |
1_05.txt | AC | 36 ms | 640 KB |
1_06.txt | AC | 36 ms | 640 KB |
1_07.txt | AC | 36 ms | 640 KB |
1_08.txt | AC | 14 ms | 384 KB |
1_09.txt | AC | 30 ms | 512 KB |
1_10.txt | AC | 25 ms | 512 KB |
1_11.txt | AC | 7 ms | 256 KB |