ABCPATH - ABC Path

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You will be given a 2-dimensional grid of letters. Find the length of the longest path of consecutive letters, starting at 'A'. Paths can step from one letter in the grid to any adjacent letter (horizontally, vertically, or diagonally).

For example, in the following grid, there are several paths from 'A' to 'D', but none from 'A' to 'E':

ABC

One such path is:

path

Input

Each test case will start with a line contains two integers H, W the height and width of the grid respectively 1 <= H, W <= 50. Then H lines follow each of W uppercase letters only. Input terminates with H = 0 and W = 0.

Output

For each test case print “Case C: X” without quotes where C is the case number starting with 1 and X is the solution.

Example

Sample Input:
4 3
ABE
CFG
BDH
ABC
0 0

Sample Output:
Case 1: 4

hide comments
blueconch: 2021-02-12 03:54:04

AC in one go :)

amdee07: 2021-01-20 09:46:53

don't take maximum as global cost me 4WA's

rakibul6636: 2020-11-03 20:18:08

Can anyone please look at it, Why it's getting WA
<snip>

[NG]: Use the forum for code review and discussion.

Last edit: 2020-11-03 21:59:13
dhruvroy8: 2020-10-19 11:44:57

do i assume the the first character to be 'A'( i mean the [0][0]'th character ) or i will have to find it out by myself?

devendra777999: 2020-09-18 12:22:40

CAREFULL WITH EDGE CASES LIKE NO 'A' OR JUST 1 'A'....AND BFS WITH LITTLE MODIFICATION WORKS !!

owaisrcoem: 2020-07-12 18:49:31

AC ! in 5th Attempt using DFS :( ,

akt_114: 2020-06-19 20:55:47

If you're getting TLE, use memoization :)

czhang2718: 2020-06-13 03:19:28

don't forget endl

ashish_2495: 2020-06-02 19:52:55

I am not understanding its input pattern can any one explain

bhavya_kala10: 2020-05-23 18:47:38

Normal dfs


Added by:Ali Arous
Date:2011-11-05
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64
Resource:FCIS Local Contest 2012