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  1. #include <bits/stdc++.h>
  2.  
  3.     using namespace std;
  4.  
  5.     const int MAX_N = 1005;
  6.  
  7.     int n, mod;
  8.     int fibonacci[MAX_N], dp[MAX_N];
  9.  
  10.     int main() {
  11.         ios::sync_with_stdio(false);
  12.         cin.tie(0);
  13.         cout.tie(0);
  14.  
  15.         freopen("LISFIBO.inp", "r", stdin);
  16.         freopen("LISFIBO.out", "w", stdout);
  17.  
  18.         cin >> n >> mod;
  19.  
  20.         fibonacci[1] = 1;
  21.         fibonacci[2] = 1;
  22.         for (int i = 3; i <= n; ++i) {
  23.             fibonacci[i] = (fibonacci[i - 2] + fibonacci[i - 1]) % mod;
  24.         }
  25.  
  26.         int res = 0;
  27.         for (int i = 1; i <= n; ++i) {
  28.             dp[i] = 1;
  29.             for (int j = 1; j < i; ++j) {
  30.                 if (fibonacci[j] <= fibonacci[i]) {
  31.                     dp[i] = max(dp[i], dp[j] + 1);
  32.                 }
  33.             }
  34.             res = max(res, dp[i]);
  35.         }
  36.  
  37.         cout << res << '\n';
  38.  
  39.         return 0;
  40.     }
Success #stdin #stdout 0.01s 5280KB
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https://ideone.com/bdy1Qa
language:
C++14 (gcc 8.3)
created:
5 hours ago
visibility:
public

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