Update 0072.编辑距离.md

problems/0072.编辑距离.md

@@ -204,7 +204,40 @@ Python：
 
 
 Go：
-
+```Go
+func minDistance(word1 string, word2 string) int {
+	m, n := len(word1), len(word2)
+	dp := make([][]int, m+1)
+	for i := range dp {
+		dp[i] = make([]int, n+1)
+	}
+	for i := 0; i < m+1; i++ {
+		dp[i][0] = i // word1[i] 变成 word2[0], 删掉 word1[i], 需要 i 部操作
+	}
+	for j := 0; j < n+1; j++ {
+		dp[0][j] = j // word1[0] 变成 word2[j], 插入 word1[j]，需要 j 部操作
+	}
+	for i := 1; i < m+1; i++ {
+		for j := 1; j < n+1; j++ {
+			if word1[i-1] == word2[j-1] {
+				dp[i][j] = dp[i-1][j-1]
+			} else { // Min(插入，删除，替换)
+				dp[i][j] = Min(dp[i][j-1], dp[i-1][j], dp[i-1][j-1]) + 1
+			}
+		}
+	}
+	return dp[m][n]
+}
+func Min(args ...int) int {
+	min := args[0]
+	for _, item := range args {
+		if item < min {
+			min = item
+		}
+	}
+	return min
+}
+```