IncredibleThings

摘要： Given a string s of lower and upper case English letters. A good string is a string which doesn't have two adjacent characters s[i] and s[i + 1] where 阅读全文

摘要： You are given an array of positive integers w where w[i] describes the weight of ith index (0-indexed). We need to call the function pickIndex() which 阅读全文