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Design a class with two methods: `addPair` and `getRate`. Add pair takes a bank, currency pair, and exchange rate. Get rate returns the average rate for a given currency pair across all banks. Get rate should run in `O(1)` time.
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Software Engineer (Entry Level)

Interviewed at Bloomberg

4
Feb 23, 2022

Design a class with two methods: `addPair` and `getRate`. Add pair takes a bank, currency pair, and exchange rate. Get rate returns the average rate for a given currency pair across all banks. Get rate should run in `O(1)` time.

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