結果

問題 No.526 フィボナッチ数列の第N項をMで割った余りを求める
コンテスト
ユーザー Khun
提出日時 2022-12-30 23:04:22
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 75 ms / 2,000 ms
コード長 449 bytes
コンパイル時間 1,585 ms
コンパイル使用メモリ 165,640 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-11-25 21:33:44
合計ジャッジ時間 2,536 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge3
このコードへのチャレンジ
（要ログイン）
ファイルパターン 結果
sample AC * 3
other AC * 12
権限があれば一括ダウンロードができます
コンパイルメッセージ
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/istream:39,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/sstream:38,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/complex:45,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/ccomplex:39,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/x86_64-pc-linux-gnu/bits/stdc++.h:54,
                 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:22:11:
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.3.0/include/c++/12/ostream:202:25: warning: 'pre' may be used uninitialized [-Wmaybe-uninitialized]
  202 |       { return _M_insert(__n); }
      |                ~~~~~~~~~^~~~~
main.cpp: In function 'int main()':
main.cpp:12:6: note: 'pre' was declared here
   12 |   ll pre, prepre;
      |      ^~~

ソースコード

diff # 

#include <bits/stdc++.h>
#define rep(i,n) for(int i=0; i<n; ++i)
using namespace std;
using std::abs;
using P = pair<long long, long long>;
typedef long long ll;
const ll INF = 100000000000000000LL;

int main(void) {
 ll N, M;
  cin >> N >> M;
  ll pre, prepre;
  rep(i, N) {
    if(i == 0) prepre = 0;
    else if(i == 1) pre = 1;
    else {
      ll tmp = (prepre + pre) % M;
      prepre = pre;
      pre = tmp;
    }
  }
  cout << pre << endl;
}
0