Card Range Fill

OAStripeLast reported April 2025Low Frequency
Reported
1× across candidate reports
First seen
April 2025
Last reported
April 2025
Reported outcome
unknown

Problem Overview

Given a 6-digit BIN (Bank Identification Number) string and an array of card number range strings, produce a complete sorted list of 16-digit card number ranges covering the full 10-digit suffix space (0000000000–9999999999). Each input range string has the format "lower,upper,CardType" where lower and upper are 10-digit suffixes. To form…

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  • Approach and trade-offs — what passing candidates did, and the mistakes that sink people
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