Added task 2154.

Author: AryamanMishra

src/main/java/g2101_2200/s2154_keep_multiplying_found_values_by_two/Solution.java

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+package g2101_2200.s2154_keep_multiplying_found_values_by_two;
+
+// #Easy #Array #Hash_Table #Sorting #Simulation
+// #2022_06_01_Time_1_ms_(93.21%)_Space_44.6_MB_(46.46%)
+
+public class Solution {
+ public int findFinalValue(int[] nums, int original) {
+ int i = 0;
+ while (i < nums.length) {
+ if (nums[i] == original) {
+ original = original * 2;
+ i = -1;
+ }
+ i++;
+ }
+ return original;
+ }
+}

src/main/java/g2101_2200/s2154_keep_multiplying_found_values_by_two/readme.md

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+2154\. Keep Multiplying Found Values by Two
+
+Easy
+
+You are given an array of integers `nums`. You are also given an integer `original` which is the first number that needs to be searched for in `nums`.
+
+You then do the following steps:
+
+1. If `original` is found in `nums`, **multiply** it by two (i.e., set `original = 2 * original`).
+2. Otherwise, **stop** the process.
+3. **Repeat** this process with the new number as long as you keep finding the number.
+
+Return _the **final** value of_ `original`.
+
+**Example 1:**
+
+**Input:** nums = [5,3,6,1,12], original = 3
+
+**Output:** 24
+
+**Explanation:** 
+- 3 is found in nums. 3 is multiplied by 2 to obtain 6. 
+
+- 6 is found in nums. 6 is multiplied by 2 to obtain 12. 
+
+- 12 is found in nums. 12 is multiplied by 2 to obtain 24. 
+
+- 24 is not found in nums. 
+Thus, 24 is returned. 
+
+**Example 2:**
+
+**Input:** nums = [2,7,9], original = 4
+
+**Output:** 4
+
+**Explanation:** 
+- 4 is not found in nums. 
+
+Thus, 4 is returned. 
+
+**Constraints:**
+
+* `1 <= nums.length <= 1000`
+* `1 <= nums[i], original <= 1000`

src/test/java/g2101_2200/s2154_keep_multiplying_found_values_by_two/SolutionTest.java

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+package g2101_2200.s2154_keep_multiplying_found_values_by_two;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import org.junit.jupiter.api.Test;
+
+class SolutionTest {
+ @Test
+ void findFinalValue() {
+ assertThat(new Solution().findFinalValue(new int[] {5, 3, 6, 1, 12}, 3), equalTo(24));
+ }
+
+ @Test
+ void findFinalValue2() {
+ assertThat(new Solution().findFinalValue(new int[] {2, 7, 9}, 4), equalTo(4));
+ }
+}