Graph Theory37 sections · 1633 units
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Space Improvement

(Reducing memory usage)

Binary lifting uses O(nlog⁡n)O(n \log n) space for the jump table. For large nn, this might exceed memory limits. You need alternatives that trade space for time. One improvement: compute jumps on-the-fly using recursion with memoization. This trades time for space. You compute jumps as needed rather than precomputing everything.

Cache results to avoid recomputation. Another approach: use square root decomposition. Store jumps for n\sqrt{n} intervals and combine. This reduces space to O(nn)O(n\sqrt{n}) with slightly worse query time of O(n)O(\sqrt{n}) instead of O(log⁡n)O(\log n). Pick based on constraints.