Best Stock
You are given the current stock prices. You have to find out which stocks cost more.
Input: The dictionary where the market identifier code is a key and the value is a stock price.
Output: The market identifier code (ticker symbol) as a string.
Example:
assert.strictEqual(bestStock({ CAC: 10.0, ATX: 390.2, WIG: 1.2 }), "ATX");
assert.strictEqual(bestStock({ CAC: 91.1, ATX: 1.01, TASI: 120.9 }), "TASI");
Preconditions: All the prices are unique.
