72.编辑距离.go

/*
 * @lc app=leetcode.cn id=72 lang=golang
 *
 * [72] 编辑距离
 */

// @lc code=start
func minDistance(word1 string, word2 string) int {
	dp := make([][]int, len(word1)+1)
	for i:=0; i<=len(word1); i++ {
		dp[i] = make([]int, len(word2)+1)
	}
	for i:=0; i<=len(word1); i++ {
		dp[i][0] = i
	}
	for i:=0; i<=len(word2); i++{
		dp[0][i] = i
	}
	for i:=1; i<=len(word1); i++{
		for j:=1; j<=len(word2); j++{
			if word1[i-1] == word2[j-1]{
				dp[i][j]=dp[i-1][j-1]
			} else {
				dp[i][j]=min(min(dp[i-1][j], dp[i][j-1]), dp[i-1][j-1])+1
			}
		}
	}
	return dp[len(word1)][len(word2)]
}
func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}
// @lc code=end