# 12.12.2025
[3433. Count Mentions Per User](https://leetcode.com/problems/count-mentions-per-user/description) medium
Count messages and track online users #medium #simulation
[3433. Count Mentions Per User](https://leetcode.com/problems/count-mentions-per-user/description) medium
Count messages and track online users #medium #simulation
👍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
# 17.12.2025
[3573. Best Time to Buy and Sell Stock V](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-v/description/) medium
K best deals buy/short/sell stocks #medium #dp
[3573. Best Time to Buy and Sell Stock V](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-v/description/) medium
K best deals buy/short/sell stocks #medium #dp
👍1