Keep Multiplying Found Values by Two
Hashmap
easy
Score: 30
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:
- If
original
is found innums
, multiply it by two (i.e., set original = 2 * original). - Otherwise, stop the process.
- Repeat this process with the new number as long as you keep finding the number.
Return the final value of original
.
Input Format:
First parameter: number N
Second parameter: an array nums
of size N.
Third parameter: number original
.
Output Format:
Return the number.
Example 1:
Input:
N=5
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:
N=3
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
- Expected Time Complexity: O(n)
- Expected Auxiliary Space: O(n)