| Biggest Number |
|Time Limit: 2000ms, Special Time Limit:5000ms, Memory Limit:65536KB |
| Total submit users: 28, Accepted users: 13 |
| Problem 10935 :
No special judgement
| You have a maze with obstacles and
non-zero digits in it:
You can start from any square, walk in
the maze, and finally stop at some square. Each step, you may only walk into one
of the four neighbouring squares (up, down, left, right)
and you cannot walk into obstacles or walk into a square more than once. When
you finish, you can get a number by writing down the digits you encounter in the
same order as you meet them. For example, you can get numbers 9784, 4832145 etc.
The biggest number you can get is 791452384, shown in the picture above.
Your task is to find the biggest number
you can get.
| There will be at most 25 test cases.
Each test begins with two integers R and C (2<=R,C<=15,
R*C<=30), the number of rows and columns of the maze. The next R
rows represent the maze. Each line contains exactly C characters (without
leading or trailing spaces), each of them will be either '#'
or one of the nine non-zero digits. There will be at least one non-obstacle
squares (i.e. squares with a non-zero digit in it) in the maze. The input is
terminated by a test case with R=C=0, you should not process it.|
| For each test case, print the biggest number you can find, on a single line.|
| The Sixth Hunan Collegiate Programming Contest|