fork download
copy 
  1. #include<bits/stdc++.h>
  2. using namespace std;
  3. const long long MOD=1e9+7;
  4. long long n,t;
  5. long long nhan(long long a, long long b, long long c)
  6. {
  7.     if(b==0ll) return 0ll;
  8.     long long t = nhan(a,b/2,c);
  9.     if(b%2==0)
  10.     {
  11.         return (t+t)%c;
  12.     }
  13.     else
  14.     {
  15.         return ((t+t)%c + a%c)%c;
  16.     }
  17. }
  18. long long mu (long long a, long long b, long long c)
  19. {
  20.     if(b==0) return 1ll;
  21.     long long t= mu(a,b/2,c);
  22.     if(b%2==0)
  23.     {
  24.         return nhan(t,t,c);
  25.     }
  26.     else
  27.     {
  28.         return nhan(nhan(t,t,c),a,c);
  29.     }
  30. }
  31. int main()
  32. {
  33.     if(fopen("cperm.inp","r"))
  34.     {
  35.         freopen("cperm.inp","r",stdin);
  36.         freopen("cperm.out","w",stdout);
  37.     }
  38.     cin >> t;
  39.     while (t--)
  40.     {
  41.         cin >> n;
  42.         if (n<=2)
  43.         {
  44.             cout << 0 << "\n";
  45.             continue;
  46.         }
  47.         cout << mu(2,n-1,MOD)-2 << "\n";
  48.     }
  49. }
  50.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/jZrscy
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!