Answer Posted / om

int f(int num)
{

if(( num>0) && (!(num & (num-1))) )
return 1;
else
return 0;
}
// f(16)...... 16 & 15 = 10000 & 01111 =00000
f(4) ...... 4 & 3 =0100 & 0111 =0000

f(11).......11 & 10 = 1011 & 1010 = 1010 so not...
f(12).......12 & 11 = 1100 & 1011 = 1000 so not...

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