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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     int L,R;
  6.     cin>>L>>R;
  7.     long long ans=0;
  8.     long long x=1;
  9.  
  10.     while(x<=R){
  11.        if(x>=L){
  12.         ans=ans+x;
  13.        }
  14.  
  15.        if(x>R/2){
  16.         break;
  17.        }
  18.        x=2*x;
  19.  
  20.     }
  21.  
  22.  
  23.     cout<<ans<<endl;
  24.     return 0;
  25. }
Success #stdin #stdout 0s 5320KB
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32767
https://ideone.com/mYnobQ
language:
C++ (gcc 8.3)
created:
8 hours ago
visibility:
public

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