Submission #3238545
Source Code Expand
#include <iostream> #include <stdio.h> #include <fstream> #include <algorithm> #include <string> #include <map> #include <set> #include <queue> #include <stack> #include <vector> #include <limits.h> #include <math.h> #include <functional> #include <bitset> #define repeat(i,n) for (long long i = 0; (i) < (n); ++ (i)) #define debug(x) cerr << #x << ": " << x << '\n' #define debugArray(x,n) for(long long i = 0; (i) < (n); ++ (i)) cerr << #x << "[" << i << "]: " << x[i] << '\n' #define debugArrayP(x,n) for(long long i = 0; (i) < (n); ++ (i)) cerr << #x << "[" << i << "]: " << x[i].first<< " " << x[i].second << '\n' using namespace std; typedef long long ll; typedef pair<int,int> Pii; typedef vector<int> vint; typedef vector<ll> vll; const ll INF = LLONG_MAX/10; const ll MOD = 1e9+7; int main(){ int N;cin >> N; vint a(N); repeat(i,N){ cin >> a[i]; a[i]--; } int ans = 0; repeat(i,N){ ans += a[a[i]]==i && i < a[i]; } cout << ans << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | hashiryo |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 1034 Byte |
Status | AC |
Exec Time | 30 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 |
---|---|
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 | 29 ms | 640 KB |
1_02.txt | AC | 29 ms | 640 KB |
1_03.txt | AC | 30 ms | 640 KB |
1_04.txt | AC | 29 ms | 640 KB |
1_05.txt | AC | 29 ms | 640 KB |
1_06.txt | AC | 29 ms | 640 KB |
1_07.txt | AC | 29 ms | 640 KB |
1_08.txt | AC | 11 ms | 384 KB |
1_09.txt | AC | 24 ms | 512 KB |
1_10.txt | AC | 20 ms | 512 KB |
1_11.txt | AC | 5 ms | 256 KB |