题目描述 给你一个字符串 s 、一个字符串 t 。返回 s 中涵盖 t 所有字符的最小子串。如果 s 中不存在 […]
PAT (Advanced Level) Practice 1005 Spell It Right
Given a non-negative integer N, your task is to compute […]
PAT (Advanced Level) Practice 1001 A+B Format
Calculate a+b and output the sum in standard format  […]