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Dynamic Two-Array Pair Sum Queries

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Maintain arrays `a` and `b` under point updates to `a`. For each sum query, append the number of `(a[i], b[j])` pairs whose values add to the requested target.

SWE
DS
hashmap
array
simulation
medium
oa
codesignal
Frequency
Low
Last asked
2026-06-05
Stage
oa

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