grokking-the-coding-interview-patterns-for-coding-questions__design-gurus ,  number-of-flips-required-to-make-ab-equal-to-c__bitwise-or__grokking-bit-manipulation-for-coding-interviews ,  grokking-bit-manipulation-for-coding-interviews__gopi-gorantala

challenge-1-count-set-bits__bitwise-and__grokking-bit-manipulation-for-coding-interviews ,  master-bit-manipulation-for-coding-interviews__gopi-gorantala ,  grokking-bit-manipulation-for-coding-interviews__gopi-gorantala