本文主要是介绍代码随想录｜Day56｜动态规划 part16｜● 583. 两个字符串的删除操作 ● 72. 编辑距离，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
583. 两个字符串的删除操作
class Solution:
def minDistance(self, word1: str, word2: str) -> int:
dp = [[0] * (len(word2) + 1) for _ in range(len(word1) + 1)]
for i in range(len(word1) + 1):
dp[i][0] = i
for j in range(len(word2) + 1):
dp[0][j] = j
for i in range(1, len(word1) + 1):
for j in range(1, len(word2) + 1):
if word1[i - 1] == word2[j - 1]:
dp[i][j] = dp[i - 1][j - 1]
else:
dp[i][j] = min(dp[i - 1][j] + 1, dp[i][j - 1] + 1, dp[i - 1][j - 1] + 2)
return dp[len(word1)][len(word2)]
72. 编辑距离
class Solution:
def minDistance(self, word1: str, word2: str) -> int:
dp = [[0] * (len(word2) + 1) for _ in range(len(word1) + 1)]
for i in range(len(word1) + 1):
dp[i][0] = i
for j in range(len(word2) + 1):
dp[0][j] = j
for i in range(1, len(word1) + 1):
for j in range(1, len(word2) + 1):
if word1[i - 1] == word2[j - 1]:
dp[i][j] = dp[i - 1][j - 1]
else:
dp[i][j] = min(dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]) + 1 #与上题最大区别（因为可以用替换）
return dp[-1][-1]
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