Submission #891296
Source Code Expand
/************************************************************************* > File: B.cc > Author: lyyllyyl > Mail: riho.yoshioka@yandex.com > Created Time: Sat 24 Sep 2016 08:03:18 PM CST *************************************************************************/ #include <bits/stdc++.h> int a[111111]; int main() { std::ios::sync_with_stdio(0); int n; std::cin >> n; for (int i = 0; i < n; ++i) { std::cin >> a[i]; a[i]--; } int cnt = 0; for (int i = 0; i < n; ++i) { int x = i; if (a[a[x]] == x) cnt++; } assert(cnt % 2 == 0); std::cout << cnt / 2 << std::endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Friendly Rabbits |
User | Yoshioka |
Language | C++14 (GCC 5.4.1) |
Score | 200 |
Code Size | 675 Byte |
Status | AC |
Exec Time | 11 ms |
Memory | 768 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 | 2 ms | 256 KB |
0_01.txt | AC | 2 ms | 256 KB |
0_02.txt | AC | 2 ms | 256 KB |
1_00.txt | AC | 3 ms | 256 KB |
1_01.txt | AC | 11 ms | 640 KB |
1_02.txt | AC | 11 ms | 640 KB |
1_03.txt | AC | 11 ms | 640 KB |
1_04.txt | AC | 11 ms | 640 KB |
1_05.txt | AC | 11 ms | 640 KB |
1_06.txt | AC | 11 ms | 640 KB |
1_07.txt | AC | 11 ms | 768 KB |
1_08.txt | AC | 6 ms | 384 KB |
1_09.txt | AC | 10 ms | 640 KB |
1_10.txt | AC | 8 ms | 512 KB |
1_11.txt | AC | 4 ms | 384 KB |