An example of string parsing related problem:
Here each substring can be a combination of comb-A = “consonant-vowel” or comb-B = “consonant-vowel-consonant”
To parse this string we can either start parsing from the beginning of the string or from the end of the string.
- If we start parsing from the beginning of the string:
Here are some strings: “babce”, “babecfa”, “babeca”
There are possibilities of comb-A or comb-B. If we go with one of the combinations, we may not be able to parse the remaining string. Ex. “babeca” = “bab” +”eca” which is not valid.
2. If we start parsing from the end of the string: The problem states that there are only valid strings given as input. If the string is ending with the consonant assume comb-B else comb-A. So, there is no ambiguity with this approach.
Here is the solution:
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