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Update 0072.编辑距离.md

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`@@ -429,6 +429,36 @@ impl Solution {`
`429`	`429`	`}`
`430`	`430`	```
`431`	`431`
	`432`	`+> 一维 dp`
	`433`	`+`
	`434`	+```rust
	`435`	`+impl Solution {`
	`436`	`+ pub fn min_distance(word1: String, word2: String) -> i32 {`
	`437`	`+ let mut dp = vec![0; word1.len() + 1];`
	`438`	`+ for (i, v) in dp.iter_mut().enumerate().skip(1) {`
	`439`	`+ *v = i;`
	`440`	`+ }`
	`441`	`+`
	`442`	`+ for char2 in word2.chars() {`
	`443`	`+ // 相当于 dp[i][0] 的初始化`
	`444`	`+ let mut pre = dp[0];`
	`445`	`+ dp[0] += 1; // j = 0, 将前 i 个字符变成空串的个数`
	`446`	`+ for (j, char1) in word1.chars().enumerate() {`
	`447`	`+ let temp = dp[j + 1];`
	`448`	`+ if char1 == char2 {`
	`449`	`+ dp[j + 1] = pre;`
	`450`	`+ } else {`
	`451`	`+ dp[j + 1] = dp[j + 1].min(dp[j]).min(pre) + 1;`
	`452`	`+ }`
	`453`	`+ pre = temp;`
	`454`	`+ }`
	`455`	`+ }`
	`456`	`+`
	`457`	`+ dp[word1.len()] as i32`
	`458`	`+ }`
	`459`	`+}`
	`460`	+```
	`461`	`+`
`432`	`462`	`<p align="center">`
`433`	`463`	`<a href="https://programmercarl.com/other/kstar.html" target="_blank">`
`434`	`464`	`<img src="../pics/网站星球宣传海报.jpg" width="1000"/>`

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