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  1. #include<iostream>
  2. using namespace std;
  3. int main()
  4. {
  5.     long long a;
  6.     int b;
  7.     int d[3][3];
  8.     int c[3][3];
  9.     cin >> a >>b;
  10.     d[1][1] = 1;
  11.     d[1][2] = 1;
  12.     d[2][1] = 1;
  13.     d[2][2] = 0;
  14.     c[1][1] = 1;
  15.     c[2][1] = 0;
  16.     for(int i = 0; i < a; i++)
  17.     {
  18.         int r = c[1][1];
  19.         c[1][1] = d[1][1] * c[1][1] % b + d[1][2] * c[2][1] % b;
  20.         c[2][1] = r;
  21.  
  22.     }
  23.     cout << c[2][1];
  24.  
  25. }
  26.  
Success #stdin #stdout 0s 3300KB
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stdin
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115 26673
stdout
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34727
https://ideone.com/XoZUdh
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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