what does (1<<n)-1 do
Travelling sales problem
it is a more efficient way to calculate power of 2^n
basically u are shifting 1 by n bits
1<<2
100 == 4
1<<4
10000= =16
what does (1<<n)-1 do
it is a more efficient way to calculate power of 2^n
basically u are shifting 1 by n bits
1<<2
100 == 4
1<<4
10000= =16