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Leetcode 3645. Maximum Total from Optimal Activation Order
Given pairs (value[i], limit[i]), find an activation order that maximizes the sum of values where you can activate i only if the current number of active elements is strictly less than limit[i], and after each activation any items with limit ≤ the new active count become permanently unusable. The core challenge is ordering selections under changing feasibility constraints — a greedy/priority-queue style scheduling problem that balances choosing high-value items while keeping the active count low enough to enable others.
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