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Quick Summary

Find the minimum non-negative increment x to add to a non-adjacent subset of elements.
Ensure the modified array satisfies a non-decreasing order across all adjacent pairs.
Determine feasibility by balancing required lower bounds against allowed upper bounds.

What This Tests

Greedy constraint satisfaction
Local-to-global implication analysis
Boundary condition handling in arrays
Feasibility interval checking

Common Patterns

Greedy

Accepted

45/94

Acceptance Rate47.9%

Test Cases

Input

arr =

Output

Expected