72.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 character c) Replace a character

• http://www.geeksforgeeks.org/dynamic-programming-set-5-edit-distance/
• http://www.cnblogs.com/grandyang/p/4344107.html