-
Notifications
You must be signed in to change notification settings - Fork 2
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
2 changed files
with
36 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,27 @@ | ||
# Descripción | ||
|
||
Invertir en criptomonedas es casi un deporte de riesgo. El otro día hackearon Bitmart y ha hecho que el valor de Bitcoin, y otras monedas, bajase un 25%. | ||
|
||
Vamos a escribir una función que reciba la lista de precios de una criptomoneda en un día y debemos devolver la ganancia máxima que podríamos sacar si compramos y vendemos la inversión el mismo día. | ||
|
||
La lista de precios es un array de números y representa el tiempo de izquierda a derecha. Por lo que ten en cuenta que no puedes comprar a un precio que esté a la derecha de la venta y no puedes vender a un precio que esté a la izquierda de la compra. | ||
|
||
Por ejemplo: | ||
|
||
```js | ||
const pricesBtc = [39, 18, 29, 25, 34, 32, 5] | ||
maxProfit(pricesBtc) // -> 16 (compra a 18, vende a 34) | ||
|
||
const pricesEth = [10, 20, 30, 40, 50, 60, 70] | ||
maxProfit(pricesEth) // -> 60 (compra a 10, vende a 70) | ||
``` | ||
|
||
Si ese día no se puede sacar ningún beneficio, tenemos que devolver -1 para evitar que hagamos una locura: | ||
|
||
```js | ||
const pricesDoge = [18, 15, 12, 11, 9, 7] | ||
maxProfit(pricesDoge) = // -> -1 (no hay ganancia posible) | ||
|
||
const pricesAda = [3, 3, 3, 3, 3] | ||
maxProfit(pricesAda) = // -> -1 (no hay ganancia posible) | ||
``` |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,9 @@ | ||
export default function maxProfit(prices) { | ||
const last = prices.pop(); | ||
const min = Math.min(...prices); | ||
const indexMin = prices.indexOf(min); | ||
prices.push(last); | ||
const max = Math.max(...prices.slice(indexMin + 1)); | ||
const result = max - min; | ||
return result > 0 ? result : -1; | ||
} |