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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. #define print(a)         for(auto x : a) cout << x << " "; cout << endl
  6.  
  7.  
  8. const int M = 1000000007;
  9. const int N = 3e5+9;
  10. const int INF = 2e9+1;
  11. const int LINF = 2000000000000000001;
  12.  
  13. inline int power(int a, int b, int mod=M) {
  14.     int x = 1;
  15.     a %= mod;
  16.     while (b) {
  17.         if (b & 1) x = (x * a) % mod; 
  18.         a = (a * a) % mod;
  19.         b >>= 1;
  20.     }
  21.     return x;
  22. }
  23.  
  24.  
  25. //_ ***************************** START Below *******************************
  26.  
  27.  
  28.  
  29.  
  30.  
  31. int consistency(int n){
  32.  
  33.     return (power(3, 3*n) - power(7, n)+M)%M;
  34.  
  35. }
  36.  
  37.  
  38.  
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  40.  
  41.  
  42.  
  43.  
  44.  
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  46.  
  47.  
  48.  
  49.  
  50.  
  51. int practice(int n){
  52.  
  53.  
  54.     return 0;
  55. }
  56.  
  57.  
  58.  
  59.  
  60.  
  61. void solve() {
  62.  
  63.     int n;
  64.     cin>> n;
  65.  
  66.     cout << consistency(n) << endl;
  67.  
  68.  
  69. }
  70.  
  71.  
  72.  
  73.  
  74.  
  75. int32_t main() {
  76.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  77.  
  78.     int t = 1;
  79.     // cin >> t;
  80.     while (t--) {
  81.         solve();
  82.     }
  83.  
  84.     return 0;
  85. }
Success #stdin #stdout 0.01s 5312KB
comments (?)
stdin 
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stdout 
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https://ideone.com/MmQWr4
language:
C++14 (gcc 8.3)
created:
2 hours ago
visibility:
public

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