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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. #define file(NAME) if (fopen(NAME".inp", "r"))  freopen(NAME".inp", "r", stdin), freopen(NAME".out", "w", stdout)
  6. #define FOR(i, a, b) for (int i = (int) a; i <= (int) b; ++i)
  7. #define FOD(i, a, b) for (int i = (int) a; i >= (int) b; --i)
  8.  
  9. #define all(s) (s).begin(), (s).end()
  10. #define pb push_back
  11. #define ll long long
  12. #define int ll
  13. #define fi first
  14. #define se second
  15. #define pii pair<int, int>
  16.  
  17. const int maxn = 1e6 + 5;
  18. const int N = 505;
  19. const int MOD = 1e9 + 7;
  20.  
  21. int n;
  22. int dp[maxn];
  23.  
  24.  
  25. int calc(int val) {
  26.     if (val > n) return 0;
  27.     if (val == n) return 1; 
  28.  
  29.  
  30.     int &ans = dp[val];
  31.  
  32.     if (ans != 0) return ans;
  33.  
  34.  
  35.     for (int i = 1; i <= 6; ++i) {
  36.         ans = (ans + calc(val + i) % MOD) % MOD;
  37.  
  38.     }
  39.  
  40.     return ans;
  41. }
  42.  
  43.  
  44.  
  45.  
  46. signed main() {
  47.     cin.tie(0) -> sync_with_stdio(0);
  48.     file("x");
  49.  
  50.  
  51.  
  52.     cin >> n;
  53.  
  54.  
  55.  
  56.     cout << calc(0);
  57.  
  58.     return 0;
  59. }
Success #stdin #stdout 0.01s 12336KB
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https://ideone.com/1FGtnG
language:
C++14 (gcc 8.3)
created:
10 days ago
visibility:
public

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