Submission #1935664
Source Code Expand
#include<iostream> #include<cstdio> #include<vector> #include<string> #include<cstring> #include<functional> #include<stack> #include<queue> #include <iomanip> #include<map> #include<limits> #include<cmath> #include<algorithm> #include<bitset> #include<deque> #include<utility> #include<complex> #include<cstdlib> #include<set> #include<cctype> using namespace std; #define DBG cerr << '!' << endl; #define REP(i,n) for(ll (i) = (0);(i) < (n);++i) #define rep(i,s,g) for(ll (i) = (s);(i) < (g);++i) #define rrep(i,s,g) for(ll (i) = (s);i >= (g);--(i)) #define PB push_back #define MP make_pair #define FI first #define SE second #define SHOW1d(v,n) {for(int W = 0;W < (n);W++)cerr << v[W] << ' ';cerr << endl << endl;} #define SHOW2d(v,i,j) {for(int aaa = 0;aaa < i;aaa++){for(int bbb = 0;bbb < j;bbb++)cerr << v[aaa][bbb] << ' ';cerr << endl;}cerr << endl;} #define ALL(v) v.begin(),v.end() #define Decimal fixed<<setprecision(10) typedef long long ll; typedef vector<int> iv; typedef vector<iv> iiv; typedef vector<string> sv; int main() { int n;cin >> n; vector<int> v; REP(i,n) { int tmp;cin >> tmp;tmp--;v.PB(tmp); } int ans = 0; REP(i,n) { if(v[v[i]] == i)ans++; } cout << ans/2 << endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | seica |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 1283 Byte |
Status | AC |
Exec Time | 29 ms |
Memory | 892 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 | 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 | 892 KB |
1_02.txt | AC | 29 ms | 892 KB |
1_03.txt | AC | 29 ms | 892 KB |
1_04.txt | AC | 29 ms | 892 KB |
1_05.txt | AC | 29 ms | 892 KB |
1_06.txt | AC | 29 ms | 892 KB |
1_07.txt | AC | 29 ms | 892 KB |
1_08.txt | AC | 11 ms | 640 KB |
1_09.txt | AC | 24 ms | 892 KB |
1_10.txt | AC | 21 ms | 892 KB |
1_11.txt | AC | 5 ms | 384 KB |