摘要：Given 3 positives numbers a, b and c. Return the minimum flips required in some bits of a and b to make ( a OR b == c ). (bitwise OR operation). Flip 阅读全文

摘要：No-Zero integer is a positive integer that does not contain any 0 in its decimal representation. Given an integer n, return a list of two integers [A, 阅读全文

摘要：Return the number of distinct non-empty substrings of text that can be written as the concatenation of some string with itself (i.e. it can be written 阅读全文