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  1. int expo(int a,int b,int M)
  2. {
  3.     int res=1;
  4.     a%=M;
  5.     while(b)
  6.     {
  7.         if(b&1)
  8.         {
  9.             res=(res*1ll*a)%M;
  10.         }
  11.         a=(a*1ll*a)%M;
  12.         b>>=1;
  13.     }
  14.     return res;
  15. }
  16.  
  17. int fun(vector<int> arr) {
  18.     int M =1e9+7, n=arr.size();
  19.     int ans=0;
  20.     for(int i=0; i<n;i++)
  21.     {
  22.         ans |=arr[i];
  23.     }
  24.  
  25.     ans = (expo(2,n-1,M) *1ll* ans)%M;
  26.     return ans;
  27. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
prog.cpp:17:9: error: ‘vector’ was not declared in this scope
 int fun(vector<int> arr) {
         ^~~~~~
prog.cpp:17:16: error: expected primary-expression before ‘int’
 int fun(vector<int> arr) {
                ^~~
stdout 
Standard output is empty
https://ideone.com/WY5KXg
language:
C++ (gcc 8.3)
created:
353 days ago
visibility:
secret

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