# 13.12.2025
[3606. Coupon Code Validator](https://leetcode.com/problems/coupon-code-validator/description/) easy
Filter a,b,c according to rules #easy
[3606. Coupon Code Validator](https://leetcode.com/problems/coupon-code-validator/description/) easy
Filter a,b,c according to rules #easy
👍1
# 14.12.2025
[2147. Number of Ways to Divide a Long Corridor](https://leetcode.com/problems/number-of-ways-to-divide-a-long-corridor/description/) hard
Ways to split pairs of S #hard
[2147. Number of Ways to Divide a Long Corridor](https://leetcode.com/problems/number-of-ways-to-divide-a-long-corridor/description/) hard
Ways to split pairs of S #hard
👍1
# 15.12.2025
[2110. Number of Smooth Descent Periods of a Stock](https://leetcode.com/problems/number-of-smooth-descent-periods-of-a-stock/description/) medium
Decreasing subarrays #medium
[2110. Number of Smooth Descent Periods of a Stock](https://leetcode.com/problems/number-of-smooth-descent-periods-of-a-stock/description/) medium
Decreasing subarrays #medium
👍1
# 16.12.2025
[3562. Maximum Profit from Trading Stocks with Discounts](https://leetcode.com/problems/maximum-profit-from-trading-stocks-with-discounts/description/) hard
Max profit in a tree #hard
[3562. Maximum Profit from Trading Stocks with Discounts](https://leetcode.com/problems/maximum-profit-from-trading-stocks-with-discounts/description/) hard
Max profit in a tree #hard
👍1