16 lines
426 B
Markdown
16 lines
426 B
Markdown
# 替换空格
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[Leetcode](https://leetcode.cn/problems/ti-huan-kong-ge-lcof/)
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请实现一个函数，把字符串 s 中的每个空格替换成"%20"。
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示例 1：
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> 输入：s = "We are happy."
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>
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> 输出："We%20are%20happy."
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对于很多数组填充类问题，都可以先计算出扩展后数组的长度，然后从后往前双指针。
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