How to Solve Verbal Arithmetic Puzzle Problem
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Verbal Arithmetic Puzzle
Given an equation, represented by words on the left side and the result on the right side. You need to check if the equation is solvable under the following rules: Each character is decoded as one dig...
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Understanding the Verbal Arithmetic Puzzle Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
Given an equation, represented by words on the left side and the result on the right side. You need to check if the equation is solvable under the following rules: Each character is decoded as one digit (0 - 9). No two characters can map to the same digit. Each words[i] and result are decoded as one number without leading zeros. Sum of numbers on the left side (words) will equal to the number on the right side (result). Return true if the equation is solvable, otherwise return false.
Verbal Arithmetic Puzzle
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Examples
words = ["SEND","MORE"], result = "MONEY"trueMap 'S'-> 9, 'E'->5, 'N'->6, 'D'->7, 'M'->1, 'O'->0, 'R'->8, 'Y'->'2' Such that: "SEND" + "MORE" = "MONEY" , 9567 + 1085 = 10652
words = ["SIX","SEVEN","SEVEN"], result = "TWENTY"trueMap 'S'-> 6, 'I'->5, 'X'->0, 'E'->8, 'V'->7, 'N'->2, 'T'->1, 'W'->'3', 'Y'->4 Such that: "SIX" + "SEVEN" + "SEVEN" = "TWENTY" , 650 + 68782 + 68782 = 138214
words = ["LEET","CODE"], result = "POINT"falseThere is no possible mapping to satisfy the equation, so we return false. Note that two different characters cannot map to the same digit.
Constraints
2 <= words.length <= 51 <= words[i].length, result.length <= 7words[i], result contain only uppercase English letters.The number of different characters used in the expression is at most 10.How Interview Coder Helps with Leetcode Problems
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