Submission #891786
Source Code Expand
#include "bits/stdc++.h"
using namespace std;
//#define int int64_t
#define CHOOSE(a) CHOOSE2 a
#define CHOOSE2(a0,a1,a2,a3,x,...) x
#define REP1(i, s, cond, cal) for (signed i = signed(s); i cond; i cal)
#define REP2(i, s, n) REP1(i, s, < signed(n), ++)
#define REP3(i, n) REP2(i, 0, n)
#define rep(...) CHOOSE((__VA_ARGS__,REP1,REP2,REP3))(__VA_ARGS__)
#define rrep(i, s) rep(i, s, >= 0, --)
#define all(c) begin(c), end(c)
#define maxup(ans, x) (ans = (ans < x ? x : ans))
#define minup(ans, x) (ans = (ans > x ? x : ans))
#define breakif(cond) if(cond) break; else
template<typename T>
inline void input(vector<T>& v) { for (auto& x : v) cin >> x; }
using VV = vector<vector<int>>;
using V = vector<int>;
using P = pair<int, int>;
using IP = pair<int, P>;
const int INF = 1 << 29;
signed main() {
int n; cin >> n;
V v(n);
rep(i, n)cin >> v[i];
int ans = 0;
rep(i, n) {
if (v[v[i] - 1] - 1 == i) ans++;
}
cout << ans / 2 << endl;
system("pause");
}
Submission Info
Submission Time
2016-09-24 21:07:54+0900
Task
B - Friendly Rabbits
User
tosaka2
Language
C++14 (GCC 5.4.1)
Score
200
Code Size
1008 Byte
Status
AC
Exec Time
33 ms
Memory
888 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:39:17: warning: ignoring return value of ‘int system(const char*)’, declared with attribute warn_unused_result [-Wunused-result]
system("pause");
^
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
4 ms
504 KB
0_01.txt
AC
4 ms
504 KB
0_02.txt
AC
4 ms
504 KB
1_00.txt
AC
4 ms
500 KB
1_01.txt
AC
32 ms
888 KB
1_02.txt
AC
32 ms
888 KB
1_03.txt
AC
33 ms
888 KB
1_04.txt
AC
32 ms
888 KB
1_05.txt
AC
32 ms
888 KB
1_06.txt
AC
32 ms
888 KB
1_07.txt
AC
32 ms
888 KB
1_08.txt
AC
14 ms
632 KB
1_09.txt
AC
27 ms
760 KB
1_10.txt
AC
24 ms
760 KB
1_11.txt
AC
8 ms
504 KB