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Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order. E 阅读全文
posted @ 2020-01-02 12:13
xuan_abc
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Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word (last word means the last appea 阅读全文
posted @ 2020-01-02 11:46
xuan_abc
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Given a positive integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. Example: Input: 3 Output: [ [ 1, 2, 3 ], [ 8, 阅读全文
posted @ 2020-01-02 06:15
xuan_abc
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Count the number of segments in a string, where a segment is defined to be a contiguous sequence of non-space characters. Please note that the string 阅读全文
posted @ 2020-01-02 05:04
xuan_abc
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Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For example, two 阅读全文
posted @ 2020-01-02 04:45
xuan_abc
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Roman numerals are represented by seven different symbols: I, V, X, L, C, Dand M. Symbol Value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For example, two i 阅读全文
posted @ 2020-01-02 00:55
xuan_abc
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