摘要： 题目描述 Carryless addition is the same as normal addition, except any carries are ignored (in base 10). Thus, 37 + 48 is 75, not 85. Carryless multiplica 阅读全文

摘要： 题目描述 You are given a sequence of n integers x = [x1,x2,...,xn] and an integer k . It is guaranteed that 1 ≤ xi ≤ k , and every integer from 1 to k app 阅读全文

摘要： 题目描述 A set of words is called swap free if there is no way to turn any word in the set into any other word in the set by swapping only a single pair o 阅读全文