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  1.     #include<bits/stdc++.h>
  2.  #define ll unsigned long long int
  3.   ll mod=1000000007;
  4.   using namespace std;
  5.  int main(){
  6.      ll n,p=1;
  7.      cin>>n;
  8.      ll count=1,sum=0;
  9.      while(n>0){
  10.          ll temp=n%2;
  11.            p=(p*7)%mod;
  12.           if(temp==1)
  13.           sum=(sum%mod+p%mod)%mod;
  14.           n/=2;
  15.      }
  16.      cout<<sum;
  17.  }
Success #stdin #stdout 0s 4496KB
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https://ideone.com/k1KhFA
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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