Package g1301_1400.s1307_verbal_arithmetic_puzzle

Class Solution

java.lang.Object
g1301_1400.s1307_verbal_arithmetic_puzzle.Solution
public class Solution extends Object
1307 - Verbal Arithmetic Puzzle.

Hard

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).
  • Every pair of different characters must map to different digits.
  • 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.

Example 1:

Input: words = [“SEND”,“MORE”], result = “MONEY”

Output: true

Explanation: Map ‘S’-> 9, ‘E’->5, ‘N’->6, ‘D’->7, ‘M’->1, ‘O’->0, ‘R’->8, ‘Y’->‘2’ Such that: “SEND” + “MORE” = “MONEY” , 9567 + 1085 = 10652

Example 2:

Input: words = [“SIX”,“SEVEN”,“SEVEN”], result = “TWENTY”

Output: true

Explanation: Map ‘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

Example 3:

Input: words = [“LEET”,“CODE”], result = “POINT”

Output: false

Constraints:

  • 2 <= words.length <= 5
  • 1 <= words[i].length, result.length <= 7
  • words[i], result contain only uppercase English letters.
  • The number of different characters used in the expression is at most 10.

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • isSolvable

      public boolean isSolvable(String[] words, String result)