Python 刷Leetcode题库，顺带学英语单词（33）

Palindrome Partitioning

Given a string s, partition s such that every substring of the partition is a palindrome.

Return all possible palindrome partitioning of s.   [#131]

Example:
Input: "aab"
Output:
[
["aa","b"],
["a","a","b"]
]

Evaluate Reverse Polish Notation

Evaluate the value of an arithmetic expression in Reverse Polish Notation.

Valid operators are +, -, *, /. Each operand may be an integer or another expression.    [#150]

Note:

Division between two integers should truncate toward zero.

The given RPN expression is always valid. That means the expression would always evaluate to a result and there won't be any divide by zero operation.

    Example 1:
    Input: ["2", "1", "+", "3", "*"]
    Output: 9
    Explanation: ((2 + 1) * 3) = 9
    Example 2:
    Input: ["4", "13", "5", "/", "+"]
    Output: 6
    Explanation: (4 + (13 / 5)) = 6
    Example 3:
    Input: ["10", "6", "9", "3", "+", "-11", "*", "/", "*", "17", "+", "5", "+"]
    Output: 22
    Explanation:
    ((10 * (6 / ((9 + 3) * -11))) + 17) + 5
    = ((10 * (6 / (12 * -11))) + 17) + 5
    = ((10 * (6 / -132)) + 17) + 5
    = ((10 * 0) + 17) + 5
    = (0 + 17) + 5
    = 17 + 5
    = 22