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ONP - Transform the Expression |
Transform the algebraic expression with brackets into RPN form (Reverse Polish Notation). Two-argument operators: +, -, *, /, ^ (priority from the lowest to the highest), brackets ( ). Operands: only letters: a, b ... z. Assume that there is only one RPN form (no expressions like a*b*c).
Input
t [the number of expressions <= 100] expression [length <= 400] [other expressions]
Text grouped in [ ] does not appear in the input file.
Output
The expressions in RPN form, one per line.
Example
Input: 3 (a+(b*c)) ((a+b)*(z+x)) ((a+t)*((b+(a+c))^(c+d))) Output: abc*+ ab+zx+* at+bac++cd+^*
Added by: | mima |
Date: | 2004-05-01 |
Time limit: | 5s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: NODEJS PERL6 VB.NET |
Resource: | - |
hide comments
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2018-12-19 12:21:17
Got it |
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2018-12-04 10:43:11
solved by using just stack in one go...! |
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2018-12-04 08:18:08 Ritwik
There is a problem in test cases. My solution is AC in first attempt but later I found out it gives wrong output in those testcases which are without brackets. For example: "a*b+c" |
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2018-11-14 18:29:20
The Great Dijkstra's Shunting Yard Algorithm |
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2018-11-02 12:52:36
I checked out the Shunting yard problem and implemented it. It was such a beautiful algo. |
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2018-10-28 08:57:50
Tbh, I had to search up what RPN was... |
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2018-10-27 11:01:38
well, the test cases don't contain data like a-b*c, whose priority needs to be considered. |
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2018-09-20 20:00:21
easy just use of one stack and one queue. Last edit: 2018-09-21 08:30:31 |
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2018-08-28 18:59:59
Just implement properly ! |
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2018-08-18 17:30:55
AC in one go! :) Used trees though not very fast... |