結果
| 問題 | No.44 DPなすごろく |
| ユーザー |
|
| 提出日時 | 2016-03-22 21:19:55 |
| 言語 | C++11 (gcc 15.2.0 + boost 1.89.0) |
| 結果 |
AC
|
| 実行時間 | 1 ms / 5,000 ms |
| コード長 | 323 bytes |
| 記録 | |
| コンパイル時間 | 461 ms |
| コンパイル使用メモリ | 70,532 KB |
| 実行使用メモリ | 6,400 KB |
| 最終ジャッジ日時 | 2026-04-17 14:42:37 |
| 合計ジャッジ時間 | 1,393 ms |
|
ジャッジサーバーID (参考情報) |
judge3_0 / judge1_0 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 20 |
コンパイルメッセージ
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/ostream:42,
from /home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/iostream:43,
from main.cpp:1:
In member function 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>]',
inlined from 'int main()' at main.cpp:18:37:
/home/linuxbrew/.linuxbrew/Cellar/gcc/15.2.0_1/include/c++/15/bits/ostream.h:212:25: warning: 'step' may be used uninitialized [-Wmaybe-uninitialized]
212 | { return _M_insert(__n); }
| ~~~~~~~~~^~~~~
main.cpp: In function 'int main()':
main.cpp:10:23: note: 'step' was declared here
10 | long long int step;
| ^~~~
ソースコード
#include <iostream>
int main() {
std::ios::sync_with_stdio(false);
std::cin.tie(0);
int n;
std::cin >> n;
long long int step1 = 1, step2 = 2;
long long int step;
for (int i = 2; i < n; ++i) {
step = step1 + step2;
step1 = step2;
step2 = step;
}
std::cout << ((n==2) ? step2 : step) << "\n";
return 0;
}