The letter value of a letter is its position in the alphabet starting from 0 (i.e. 'a' -> 0, 'b' -> 1, 'c' -> 2, etc.).
The numerical value of some string of lowercase English letters s is the concatenation of the letter values of each letter in s, which is then converted into an integer.
For example, if s = "acb", we concatenate each letter’s letter value, resulting in "021". After converting it, we get 21.
You are given three strings firstWord, secondWord, and targetWord, each consisting of lowercase English letters 'a' through 'j'inclusive.
Return trueif the summation of the numerical values offirstWordandsecondWordequals the numerical value oftargetWord, orfalseotherwise.
Input: firstWord ="acb", secondWord ="cba", targetWord ="cdb"Output: trueExplanation:
The numerical value of firstWord is"acb"->"021"->21.The numerical value of secondWord is"cba"->"210"->210.The numerical value of targetWord is"cdb"->"231"->231.We returntrue because 21+210==231.
Example 2:
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Input: firstWord ="aaa", secondWord ="a", targetWord ="aab"Output: falseExplanation:
The numerical value of firstWord is"aaa"->"000"->0.The numerical value of secondWord is"a"->"0"->0.The numerical value of targetWord is"aab"->"001"->1.We returnfalse because 0+0!=1.
Example 3:
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Input: firstWord ="aaa", secondWord ="a", targetWord ="aaaa"Output: trueExplanation:
The numerical value of firstWord is"aaa"->"000"->0.The numerical value of secondWord is"a"->"0"->0.The numerical value of targetWord is"aaaa"->"0000"->0.We returntrue because 0+0==0.