# 20.09.2025
[3508. Implement Router](https://leetcode.com/problems/implement-router/description/) medium

Design Router: addPacket, forwardPacket, getCount(dst, ts start..end) #medium #ds

# 21.09.2025
[1912. Design Movie Rental System](https://leetcode.com/problems/design-movie-rental-system/description) medium

Design Movie Rent: rent,drop,search(5 lowest), report(5 lowest rented) #hard #ds

# 22.09.2025
[3005. Count Elements With Maximum Frequency](https://leetcode.com/problems/count-elements-with-maximum-frequency/description/) easy


Count max-freq elements #easy #counting

# 23.09.2025
[165. Compare Version Numbers](https://leetcode.com/problems/compare-version-numbers/description) medium

Compare versions x.x.x.x #medium

# 24.09.2025
[166. Fraction to Recurring Decimal](https://leetcode.com/problems/fraction-to-recurring-decimal/description) medium


Calc a/b to string x.y(z) #medium #math

# 25.09.2025
[120. Triangle](https://leetcode.com/problems/triangle/description) medium

Min path sum in triangle #medium #dp

# 26.09.2025
[611. Valid Triangle Number](https://leetcode.com/problems/valid-triangle-number/description) medium


Count triangles can be made from numbers #medium #binary_search #two_sum

# 27.09.2025
[812. Largest Triangle Area](https://leetcode.com/problems/largest-triangle-area/description/) easy

Max area triangle #easy

# 28.09.2025
[976. Largest Perimeter Triangle](https://leetcode.com/problems/largest-perimeter-triangle/description/) easy


Max triangle perimeter from array of lengths #easy #sliding_window

# 29.09.2025
[1039. Minimum Score Triangulation of Polygon](https://leetcode.com/problems/minimum-score-triangulation-of-polygon/description) medium


Min sum of triangle product for every possible triangulation #medium #dp

# 30.09.2025
[2221. Find Triangular Sum of an Array](https://leetcode.com/problems/find-triangular-sum-of-an-array/description) medium


Triangle sum % 10 #medium #simulation

# 01.10.2025
[1518. Water Bottles](https://leetcode.com/problems/water-bottles/description) easy

Total drinks with exchange empty for full #easy #simulation

# 02.10.2025
[3100. Water Bottles II](https://leetcode.com/problems/water-bottles-ii/description) medium


Total drinks with growing exchange rate empty for full #medium #simulation

# 03.10.2025
[407. Trapping Rain Water II](https://leetcode.com/problems/trapping-rain-water-ii/description) hard

Fill water in 3D #hard #dfs #sorting

# 04.10.2025
[11. Container With Most Water](https://leetcode.com/problems/container-with-most-water/description) medium


Max water container from two heights #medium #two-pointers

# 06.10.2025
[417. Pacific Atlantic Water Flow](https://leetcode.com/problems/pacific-atlantic-water-flow/description) medium

Cells travel to TL&BR in decrease order #medium #dfs

# 06.10.2025
[778. Swim in Rising Water](https://leetcode.com/problems/swim-in-rising-water/description) hard


Min time to swim to end, flooding every second #hard #bfs

# 07.10.2025
[1488. Avoid Flood in The City](https://leetcode.com/problems/avoid-flood-in-the-city/description/) medium

Replace zeros with numbers to avoid duplicates #medium #binary_search #greedy

# 05.10.2025
[2300. Successful Pairs of Spells and Potions](https://leetcode.com/problems/successful-pairs-of-spells-and-potions/description) medium

Number of potions * spells[i] bigger than success #midium #bs #sort