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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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2011-12-29 19:41:25 Klaus
I find it unbelivable that the most get it done in 0.0s . I thought my 0.14 s are not that bad. I do not think there is a general difference in the algorithm, but perhaps in the way how things are done (something like coding style)? Last edit: 2012-01-06 12:08:16 |
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2011-10-12 15:37:41 Ravi Kumar
hey i have solved this problem in my netbeans and working fine for the sample inputs but when i am submitting by pasting the code its showing compiler error. can any one help me is there any convention for class name or what exactly the problem is? |
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2011-06-11 17:39:28 Santiago Palacio
@viveck verma: no, all the expresions are binary, and between brackets. @Saivivekh Swaminathan: C# is slower than other languajes like C, or C++, that's why they run faster. Last edit: 2011-06-11 17:40:28 |
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2011-02-17 05:31:23 Manoj Ransing
Can I expect the expressions like a+b*c? (without () brackets) |
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2009-08-30 23:12:53 Gabriel Peixoto
I forgot to empty my operand stack after reading the expression and got AC! Input: a+b My program answer: ab (without the +) |