Find K Pairs with Smallest Sums

Expanding a frontier lazily from a heap instead of generating every pair.

Not attemptedLeetCodeMedium, unverified labelAccess: not determinedExtra, for review rotation

The exercise happens on LeetCode. Canonical link: https://leetcode.com/problems/find-k-pairs-with-smallest-sums/. Link check: not checkable automatically (5 Oct 2026). Opened from this app 0 times; opening is not counted as an attempt.

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