#1299
Replace Elements with Greatest Element on Right Side
newbie · 270 · lc easy +19 · verified · 72% accepted · 2,845 likes · top 81%
Description
Transform the array arr so that each element is replaced by the maximum value found to its right. The last element, having nothing to its right, is replaced with -1.
Return the modified array.
Example 1:
Input: arr = [17,18,5,4,6,1]
Output: [18,6,6,6,1,-1]
Explanation:
- index 0 --> the greatest element to the right of index 0 is index 1 (18).
- index 1 --> the greatest element to the right of index 1 is index 4 (6).
- index 2 --> the greatest element to the right of index 2 is index 4 (6).
- index 3 --> the greatest element to the right of index 3 is index 4 (6).
- index 4 --> the greatest element to the right of index 4 is index 5 (1).
- index 5 --> there are no elements to the right of index 5, so we put -1.
Example 2:
Input: arr = [400]
Output: [-1]
Explanation: There are no elements to the right of index 0.
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