Solution to https://brilliant.org/problems/hatred-of-eleven-ii/

soln.cpp

#include<bits/stdc++.h>
int main()
{ int num, k=0;
for(int a=1; a<10; a++)
   { for (int b=0;b<10;b++)
     { for (int c=0;c<10;c++)
       { for (int d=0;d<10;d++)
         { for (int e=0; e<10; e++)
           { num = a*10000 + b*1000 +c*100 + d*10 + e;
             for(int i=0; i<=5; i++)
                { int p = pow(10, i);
                  int new = (num - (num % 10*p ))/10 + num % p;
                  if (new%11 == 0)
                      std::cout<<new<<" "; k++;
                }
           }
         }
       }
     }
   }
std::cout<<"\n k = "<<k;
return 0;
}