# Lessons Learned from LeetCode
## Slicing
- How to use slicing for shifting elements

```
my_list = [1, 2, 3, 4, 5]

# Shift list to the right using positive slicing
shifted_positive = my_list[-2:] + my_list[:-2]
print(shifted_positive)  # Output: [4, 5, 1, 2, 3]

# Shift list to the left using negative slicing
shifted_negative = my_list[2:] + my_list[:2]
print(shifted_negative)  # Output: [3, 4, 5, 1, 2]

```
## Dynamically Updating a value in a Single Pass

```
# Code with faster Implementation
min_price = prices[0]  # Track the minimum price seen so far
max_profit = 0  # Track the maximum profit

for price in prices:
    # print(f'price is {price}')
    # print(f'MinPrice: {min_price} or {price}')
    # print(f'MaxProfit: {max_profit} or [{price} - {min_price} = {max(max_profit, price - min_price)}]')
    min_price = min(min_price, price)  # Update the minimum price
    max_profit = max(max_profit, price - min_price)  # Update the maximum profit
return max_profit
```