摘要：
Find Minimum in Rotated Sorted Array I Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 阅读全文
摘要：
Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or another e 阅读全文
摘要：
Given an absolute path for a file (Unix-style), simplify it. Have you met this question in a real interview? Yes Example "/home/", => "/home" "/a/./b/ 阅读全文