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题目如下： Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sur 阅读全文
posted @ 2019-03-08 15:20
seyjs
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题目如下： Given a non-empty string containing an out-of-order English representation of digits 0-9, output the digits in ascending order. Note: Example 1: 阅读全文
posted @ 2019-03-08 14:00
seyjs
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题目如下： Given a collection of intervals, find the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping. Note 阅读全文
posted @ 2019-03-08 11:10
seyjs
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题目如下： Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k times. Fi 阅读全文
posted @ 2019-03-08 11:06
seyjs
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