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Given a list of transactions, mark any transaction invalid if its amount > 1000 or if there exists another transaction with the same name within 60 minutes that occurred in a different city. The challenge is to parse and group transactions by name and then detect time-window conflicts (e.g., via sorting or pairwise checks) to return all possibly invalid entries.
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Bloomberg
Leetcode 1169. Invalid Transactions
Reported Sep 1, 2026 · 7 source reports
JUNIOR, MID_LEVEL, SENIOR
Source snapshot: Nov 12, 2026
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