一朵凋零的菊花

问题描述 Given an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution. Example: Given nums

问题描述 The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) And then read line b