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98 lines
2.4 KiB
Markdown
98 lines
2.4 KiB
Markdown
---
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id: 6a19dd69388e5a6e59e4f2ef
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title: "Challenge 326: Max Profit"
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challengeType: 29
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dashedName: challenge-326
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---
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# --description--
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Given an array of daily stock prices and a budget (in dollars), calculate the maximum profit you could make by buying and selling the stock over the given period.
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- You may only sell after you buy.
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- You may perform at most one buy and one sell transaction. Once you sell, you cannot buy again.
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- You can only buy whole shares.
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- Return the maximum possible profit as a string, rounded down to the nearest cent and formatted to two decimal places.
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# --hints--
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`get_max_profit([5, 6], 50)` should return `"10.00"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_max_profit([5, 6], 50), "10.00")`)
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}})
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```
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`get_max_profit([8, 2, 5, 10], 20)` should return `"80.00"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_max_profit([8, 2, 5, 10], 20), "80.00")`)
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}})
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```
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`get_max_profit([4, 5, 3, 6], 20)` should return `"18.00"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_max_profit([4, 5, 3, 6], 20), "18.00")`)
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}})
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```
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`get_max_profit([54.40, 51.22, 53.99, 50.28, 53.01, 52.84], 200)` should return `"8.31"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_max_profit([54.40, 51.22, 53.99, 50.28, 53.01, 52.84], 200), "8.31")`)
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}})
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```
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`get_max_profit([15.38, 15.01, 14.99, 14.62, 14.28], 80)` should return `"0.00"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_max_profit([15.38, 15.01, 14.99, 14.62, 14.28], 80), "0.00")`)
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}})
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```
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`get_max_profit([121.45, 126.82, 122.91, 124.65, 128.83, 128.83, 127.33], 1230.25)` should return `"73.80"`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_max_profit([121.45, 126.82, 122.91, 124.65, 128.83, 128.83, 127.33], 1230.25), "73.80")`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def get_max_profit(prices, budget):
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return prices
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```
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# --solutions--
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```py
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def get_max_profit(prices, budget):
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max_profit = 0
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for buy in range(len(prices) - 1):
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for sell in range(buy + 1, len(prices)):
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shares = int(budget / prices[buy])
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profit = shares * (prices[sell] - prices[buy])
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if profit > max_profit:
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max_profit = profit
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return f"{int(max_profit * 100) / 100:.2f}"
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```
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