BINARY

unsigned invert(unsigned x, int p, int n){
        return (x & ~((~(~0 << n))<<(p-1))) ^ ((~(~0 << n))<<(p-1));
   
    }

post more binary things..............show me neat things to do (*≧▽≦)

>>6
int pow2p
 (int n)
  { return !(n & (n-1)); }