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  1. #include<iostream>
  2. using namespace std;
  3. #define m 1000000007
  4.  int main()
  5.  { long long int a;
  6.    int c,t;
  7.   long long int n;
  8.   cin>>t;
  9.   while(t--)
  10.   { a=2;c=1;
  11.   cin>>n;
  12.  
  13.   for(int i=2;i<=n;i++)
  14.    {if(i%2==0)
  15.      c=(c<<1)%m;
  16.      a=(a+c)%m;
  17.      }
  18.      cout<<a<<endl;
  19.   }
  20.     return 0;
  21.     }
  22.  
Success #stdin #stdout 0.01s 2728KB
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https://ideone.com/0fuDO
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
secret

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