Sliding Window Fraud Alerts
Sliding Window Fraud Alerts
MediumAlgorithms0% accepted
Analyze a transaction stream and detect any day where the current value is at least twice the trailing median.
Approach
Read a sequence of spending values and a trailing window size D. Print the number of notifications.
Input
9 5
2 3 4 2 3 6 8 4 5
Output
2
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