|Author:||Far-Eastern Subregional||Time limit:||3 sec|
|Input file:||input.txt||Memory limit:||8 Mb|
You are to write a program emulating a very simple spreadsheet application. It works with a table with 9 rows, from "1" to "9", and 26 columns, from "A" to "Z". Table cells are referenced by names composed of column and row codes, ex. "B1", "S8".
Each cell contains an expression up to 255 characters long. Expressions use integer constants, cell references, parenthesis, operators "+", "-", "*", and "/" (whole division). For example: 567, E8/2, (3+B3)*(C4O1) are all valid expressions. All opera- tors are whole, all arguments and results are guaranteed to be less than 1000000. Divi- sion by zero yields zero.
If the value of the cell referenced by some expression is not defined, it is pre- sumed to be 0 (zero). The situation when two or more cells are mutually dependent on each other is considered a special case of circular reference.
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