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Leetcode 3013. Divide an Array Into Subarrays With Minimum Cost II
Partition nums into k contiguous subarrays (with starts s0=0<s1<...<s_{k-1}) to minimize the sum of each subarray's first element, subject to the constraint s_{k-1}-s1 ≤ dist. The core challenge is a DP over start indices with range-limited transitions (windowed coupling between early and late starts) that requires efficient sliding-window/monotonic optimizations.
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