How should I practice Stabilize Student Test Scores?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Virtu Financial online assessment problems in FastPrep.

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Stabilize Student Test Scores

Virtu Financial● MediumFULLTIMEOA

Problem statement

The array A gives the test scores of students sitting in a row. Each day, every interior student compares their score with both immediate neighbors:

If the score is strictly lower than both neighboring scores, increase it by1.
If it is strictly higher than both neighboring scores, decrease it by1.
Otherwise leave it unchanged.

All comparisons use the scores at the start of that day, and all changes happen simultaneously. The first and last scores never change. Repeat until a full day makes no changes, and return the final scores in the original order.

Function

solution(A: int[]) → int[]

Examples

Example 1

A = [0,1,0,1,0]return = [0,0,0,0,0]

After the first day, the scores are [0,0,1,0,0]. On the second day the center score drops to0, giving [0,0,0,0,0]. No later change is possible.

Example 2

A = [6,1,6]return = [6,6,6]

The endpoints stay6. The middle score is below both neighbors and increases once per day for five days, then stops at6.

Constraints

1 <= A.length <= 1000.
0 <= A[i] <= 1000.