第十八周 Leetcode 72. Edit Distance(HARD) O(N^2)DP

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第十八周 Leetcode 72. Edit Distance(HARD) O(N^2)DP

Leetcode72 看起来比较棘手的一道题(列DP方程还是要大胆猜想..) DP方程该怎么列呢? dp[i][j]表示字符串a[0....i-1]转化为b[0....j-1]的最少距离转移方程分三种情况考虑分别对应三中操作因为只需要三个值就可以更新dp[i][j] 我们可以把空间复杂度降低到O(n) Replace word1[i - 1] by word2[j - 1] (dp[i][j] = dp[i - 1][j - 1] + 1 (for replacement)); Delet…

[LeetCode] 72. Edit Distance 编辑距离

Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. You have the following 3 operations permitted on a word: Insert a character Delete a character Replace a character Example 1: Input: word1 = "h…

leetCode 72.Edit Distance (编辑距离) 解题思路和方法

Edit Distance Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.) You have the following 3 operations permitted on a word: a) Insert a character b) Delete a char…

[LeetCode] 72. Edit Distance（最短编辑距离）

传送门 Description Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.) You have the following 3 operations permitted on a word: a) Insert a characterb) Delete a cha…

LeetCode - 72. Edit Distance

最小编辑距离,动态规划经典题. Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.) You have the following 3 operations permitted on a word: a) Insert a characterb) Delete a cha…