摘要：
Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystac 阅读全文
posted @ 2019-11-10 11:10
xuan_abc
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Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. 阅读全文
posted @ 2019-11-10 10:17
xuan_abc
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Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the hist 阅读全文
posted @ 2019-11-10 05:07
xuan_abc
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摘要：
Implement a basic calculator to evaluate a simple expression string. The expression string may contain open ( and closing parentheses ), the plus + or 阅读全文
posted @ 2019-11-10 00:42
xuan_abc
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