Submission #1420894
Source Code Expand
#include<string> #include<deque> #include<queue> #include<vector> #include<algorithm> #include<iostream> #include<set> #include<cmath> #include<tuple> #include<chrono> #include<functional> #include<random> #include<unordered_set> using namespace std; typedef long long int llint; #define mp make_pair #define mt make_tuple #define pub push_back #define puf push_front #define pob pop_back #define pof pop_front #define fir first #define sec second #define res resize #define ins insert #define era erase const llint mod=1000000007; const llint big=1e9+10; const long double pai=3.141592653589793238462643383279; template <class T,class U>void mineq(T& a,U b){if(a>b){a=b;}} template <class T,class U>void maxeq(T& a,U b){if(a<b){a=b;}} llint gcd(llint a,llint b){if(b==0){return a;}return gcd(b,a%b);}//a>b llint lcm(llint a,llint b){return (a/gcd(max(a,b),min(a,b)))*b;} int main(void){ int i,n,ans=0;cin>>n; vector<int>a; for(i=0;i<n;i++){cin>>a[i];a[i]--;} for(i=0;i<n;i++){if(i==a[a[i]]){ans++;}} ans/=2; cout<<ans<<endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | WA_TLE |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1085 Byte |
Status | RE |
Exec Time | 135 ms |
Memory | 256 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 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 | RE | 135 ms | 256 KB |
0_01.txt | RE | 100 ms | 256 KB |
0_02.txt | RE | 98 ms | 256 KB |
1_00.txt | RE | 97 ms | 256 KB |
1_01.txt | RE | 97 ms | 256 KB |
1_02.txt | RE | 97 ms | 256 KB |
1_03.txt | RE | 99 ms | 256 KB |
1_04.txt | RE | 98 ms | 256 KB |
1_05.txt | RE | 98 ms | 256 KB |
1_06.txt | RE | 99 ms | 256 KB |
1_07.txt | RE | 97 ms | 256 KB |
1_08.txt | RE | 98 ms | 256 KB |
1_09.txt | RE | 97 ms | 256 KB |
1_10.txt | RE | 99 ms | 256 KB |
1_11.txt | RE | 101 ms | 256 KB |