EDIST - Edit distance

You are given two strings, A and B. Answer, what is the smallest number of operations you need to
transform A to B?

Operations are:

  1. Delete one letter from one of strings
  2. Insert one letter into one of strings
  3. Replace one of letters from one of strings with another letter


T - number of test cases

For each test case:

  • String A
  • String B

Both strings will contain only uppercase characters and they won't be longer than 2000 characters. 

There will be 10 test cases in data set.


For each test case, one line, minimum number of operations.




hide comments
iharsh234: 2016-08-20 11:28:22

challenge : do with dp[2][2005] ; ^_^

deerishi: 2016-08-02 19:33:53

Awesome Problem!! Good Dp practice. finally AC after quite a few WA's!

ghost_wire: 2016-07-28 21:53:57

comments help a lot earlier i was getting runtime error ((SIGSEGV)).thanks @ranjanakash166.

isaac: 2016-06-26 23:46:50

@annu: It may be the fact the memory you allocate in the stack has overflowed.On the other hand, the global allocation has much more memory than stack at its disposal.However, all the parameters mentioned are configurable.

Last edit: 2016-06-26 23:47:03
Annu Purohit: 2016-06-25 03:05:52

When the dp array is declared locally it gives run time error and when declared globally it awards you AC.Why?

rishabh_1997: 2016-06-17 21:27:03

Got AC in the first attempt :) Very nice question. Declare global array of size 3000*3000

ranjanakash166: 2016-06-06 09:54:03

declare the dp[][] matrix table globally if one wishes to do it in BOTTOM-UP dp...otherwise most likely to get runtime error ((SIGSEGV))

Sourabh Goel: 2016-05-31 10:20:43

declare the " int dp[2001][2001] " globally, got AC.

hvar: 2016-05-27 07:39:05

2 tle just for array size make sure it is 2101*2101 and global happy coding :)

azam_9: 2016-05-23 07:58:00

my 1st dp..<3..AC after so many WA's..:D

Added by:Mislav Balunović
Time limit:15s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: NODEJS objc PERL 6 VB.net