結果
| 問題 | No.3650 Teleportation Cycles |
| コンテスト | |
| ユーザー |
tnakao0123
|
| 提出日時 | 2026-08-29 14:58:06 |
| 言語 | C++17 (gcc 15.2.0 + boost 1.90.0) |
| 結果 |
AC
|
| 実行時間 | 17 ms / 2,000 ms |
| + 599µs | |
| コード長 | 643 bytes |
| 記録 | |
| コンパイル時間 | 203 ms |
| コンパイル使用メモリ | 52,188 KB |
| 実行使用メモリ | 6,272 KB |
| 最終ジャッジ日時 | 2026-08-29 14:58:09 |
| 合計ジャッジ時間 | 2,229 ms |
|
ジャッジサーバーID (参考情報) |
judge2_0 / judge3_0 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 36 |
コンパイルメッセージ
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/algorithm:62,
from main.cpp:7:
In function 'void std::__fill_a1(_ForwardIterator, _ForwardIterator, const _Tp&) [with _ForwardIterator = int*; _Tp = int]',
inlined from 'void std::__fill_a(_FIte, _FIte, const _Tp&) [with _FIte = int*; _Tp = int]' at /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/bits/stl_algobase.h:979:21,
inlined from 'void std::fill(_ForwardIterator, _ForwardIterator, const _Tp&) [with _ForwardIterator = int*; _Tp = int]' at /home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/bits/stl_algobase.h:1011:20,
inlined from 'int main()' at main.cpp:30:7:
/home/linuxbrew/.linuxbrew/Cellar/gcc@15/15.3.0/include/c++/15/bits/stl_algobase.h:925:18: warning: 'void* __builtin_memset(void*, int, long unsigned int)' specified size between 18446744065119617024 and 18446744073709551612 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
925 | *__first = __val;
| ~~~~~~~~~^~~~~~~
main.cpp: In function 'int main()':
main.cpp:19:16: note: destination object allocated here
19 | int as[MAX_N], gs[MAX_N];
| ^~
ソースコード
/* -*- coding: utf-8 -*-
*
* 3650.cc: No.3650 Teleportation Cycles - yukicoder
*/
#include<cstdio>
#include<algorithm>
using namespace std;
/* constant */
const int MAX_N = 200000;
/* typedef */
/* global variables */
int as[MAX_N], gs[MAX_N];
/* subroutines */
/* main */
int main() {
int n;
scanf("%d", &n);
for (int i = 0; i < n; i++) scanf("%d", as + i), as[i]--;
fill(gs, gs + n, -1);
int gn = 0, lp = 0;
for (int st = 0; st < n; st++)
if (gs[st] < 0) {
int id = gn++, u = st;
while (gs[u] < 0) gs[u] = id, u = as[u];
if (gs[u] == id) lp++;
}
printf("%d\n", lp);
return 0;
}
tnakao0123