摘要：Your friend is typing his name into a keyboard. Sometimes, when typing a character c, the key might get long pressed, and the character will be typed 阅读全文

摘要：In a network of nodes, each node is directly connected to another node if and only if . Some nodes are initially infected by malware. Whenever two nod 阅读全文

摘要：Given an integer array , and an integer , return the number of tuples such that `i 这道题是之前那道 "3Sum" 的拓展，之前那道题是说没有重复数字，而这道题却有大量的重复数字，所以每个组合可能会大量重复出现，让我们 阅读全文

摘要：Given an array of non negative integers, half of the integers in A are odd, and half of the integers are even. Sort the array so that whenever is odd, 阅读全文