Package g1801_1900.s1880_check_if_word_equals_summation_of_two_words

Class Solution

java.lang.Object

g1801_1900.s1880_check_if_word_equals_summation_of_two_words.Solution

public class Solution
extends Object

1880 - Check if Word Equals Summation of Two Words.<p>Easy</p> <p>The <strong>letter value</strong> of a letter is its position in the alphabet <strong>starting from 0</strong> (i.e. <code>'a' -> 0</code>, <code>'b' -> 1</code>, <code>'c' -> 2</code>, etc.).</p> <p>The <strong>numerical value</strong> of some string of lowercase English letters <code>s</code> is the <strong>concatenation</strong> of the <strong>letter values</strong> of each letter in <code>s</code>, which is then <strong>converted</strong> into an integer.</p> <ul> <li>For example, if <code>s = &quot;acb&quot;</code>, we concatenate each letter&rsquo;s letter value, resulting in <code>&quot;021&quot;</code>. After converting it, we get <code>21</code>.</li> </ul> <p>You are given three strings <code>firstWord</code>, <code>secondWord</code>, and <code>targetWord</code>, each consisting of lowercase English letters <code>'a'</code> through <code>'j'</code> <strong>inclusive</strong>.</p> <p>Return <code>true</code> <em>if the <strong>summation</strong> of the <strong>numerical values</strong> of</em> <code>firstWord</code> <em>and</em> <code>secondWord</code> <em>equals the <strong>numerical value</strong> of</em> <code>targetWord</code><em>, or</em> <code>false</code> <em>otherwise.</em></p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> firstWord = &ldquo;acb&rdquo;, secondWord = &ldquo;cba&rdquo;, targetWord = &ldquo;cdb&rdquo;</p> <p><strong>Output:</strong> true</p> <p><strong>Explanation:</strong></p> <p>The numerical value of firstWord is &ldquo;acb&rdquo; -> &ldquo;021&rdquo; -> 21.</p> <p>The numerical value of secondWord is &ldquo;cba&rdquo; -> &ldquo;210&rdquo; -> 210.</p> <p>The numerical value of targetWord is &ldquo;cdb&rdquo; -> &ldquo;231&rdquo; -> 231.</p> <p>We return true because 21 + 210 == 231.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> firstWord = &ldquo;aaa&rdquo;, secondWord = &ldquo;a&rdquo;, targetWord = &ldquo;aab&rdquo;</p> <p><strong>Output:</strong> false</p> <p><strong>Explanation:</strong></p> <p>The numerical value of firstWord is &ldquo;aaa&rdquo; -> &ldquo;000&rdquo; -> 0.</p> <p>The numerical value of secondWord is &ldquo;a&rdquo; -> &ldquo;0&rdquo; -> 0.</p> <p>The numerical value of targetWord is &ldquo;aab&rdquo; -> &ldquo;001&rdquo; -> 1.</p> <p>We return false because 0 + 0 != 1.</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> firstWord = &ldquo;aaa&rdquo;, secondWord = &ldquo;a&rdquo;, targetWord = &ldquo;aaaa&rdquo;</p> <p><strong>Output:</strong> true</p> <p><strong>Explanation:</strong></p> <p>The numerical value of firstWord is &ldquo;aaa&rdquo; -> &ldquo;000&rdquo; -> 0.</p> <p>The numerical value of secondWord is &ldquo;a&rdquo; -> &ldquo;0&rdquo; -> 0.</p> <p>The numerical value of targetWord is &ldquo;aaaa&rdquo; -> &ldquo;0000&rdquo; -> 0.</p> <p>We return true because 0 + 0 == 0.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= firstWord.length,</code> <code>secondWord.length,</code> <code>targetWord.length <= 8</code></li> <li><code>firstWord</code>, <code>secondWord</code>, and <code>targetWord</code> consist of lowercase English letters from <code>'a'</code> to <code>'j'</code> <strong>inclusive</strong>.</li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
boolean	isSumEqual(String firstWord, String secondWord, String targetWord)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

isSumEqual

public boolean isSumEqual(String firstWord,
 String secondWord,
 String targetWord)