Best Time to Buy and Sell Stock - Easy.py

import sys
from typing import List


class Solution:
    def maxProfit(self, prices: List[int]) -> int:
        buy = prices[0]
        profit = 0

        for i in range(1, len(prices)):
            if prices[i] < buy:
                buy = prices[i]
            elif prices[i] - buy > profit:
                profit = prices[i] - buy

        return profit