The Master of Cryptocurrencies
Crypto Bank provides $n$ crypto currencies, each of which has a fixed conversion rate with respect to dollar. The conversion rate w.r.t dollar is not subject to change over time. But as you may have imagined, the conversion rate between each pair of crypto currencies may change over time, due to economic and political factors.
Ron has $m$ bitcoins with him. The conversion rate of a bitcoin w.r.t dollar is $k$.
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