# 28.12.2025
[1351. Count Negative Numbers in a Sorted Matrix](https://leetcode.com/problems/count-negative-numbers-in-a-sorted-matrix/description/) easy
Count negatives in 2D sorted matrix #easy
[1351. Count Negative Numbers in a Sorted Matrix](https://leetcode.com/problems/count-negative-numbers-in-a-sorted-matrix/description/) easy
Count negatives in 2D sorted matrix #easy
👍1
# 29.12.2025
[756. Pyramid Transition Matrix](https://leetcode.com/problems/pyramid-transition-matrix/description/) medium
Can build a pyramid from transitions? #medium #backtracking
[756. Pyramid Transition Matrix](https://leetcode.com/problems/pyramid-transition-matrix/description/) medium
Can build a pyramid from transitions? #medium #backtracking
❤1👍1
# 30.12.2025
[840. Magic Squares In Grid](https://leetcode.com/problems/magic-squares-in-grid/description/) medium
Count 'magic' 3x3 squares #medium
[840. Magic Squares In Grid](https://leetcode.com/problems/magic-squares-in-grid/description/) medium
Count 'magic' 3x3 squares #medium
👍1
# 31.12.2025
[1970. Last Day Where You Can Still Cross](https://leetcode.com/problems/last-day-where-you-can-still-cross/description) hard
Last day top connected to bottom in 2D matrix #hard #uf
[1970. Last Day Where You Can Still Cross](https://leetcode.com/problems/last-day-where-you-can-still-cross/description) hard
Last day top connected to bottom in 2D matrix #hard #uf
👍1
# 01.01.2026
[66. Plus One](https://leetcode.com/problems/plus-one/description/) easy
Increment big number #easy
[66. Plus One](https://leetcode.com/problems/plus-one/description/) easy
Increment big number #easy
👍1
# 02.01.2026
[961. N-Repeated Element in Size 2N Array](https://leetcode.com/problems/n-repeated-element-in-size-2n-array/description/) easy
Duplicate majority element #easy
[961. N-Repeated Element in Size 2N Array](https://leetcode.com/problems/n-repeated-element-in-size-2n-array/description/) easy
Duplicate majority element #easy
👍1
# 03.12.2026
[1411. Number of Ways to Paint N × 3 Grid](https://leetcode.com/problems/number-of-ways-to-paint-n-3-grid/description) hard
Ways to color 3xN grid #hard #dp
[1411. Number of Ways to Paint N × 3 Grid](https://leetcode.com/problems/number-of-ways-to-paint-n-3-grid/description) hard
Ways to color 3xN grid #hard #dp
👍1
# 04.12.2025
[1390. Four Divisors](https://leetcode.com/problems/four-divisors/description) medium
Sum of exactly four-divisors of each number #medium #math
[1390. Four Divisors](https://leetcode.com/problems/four-divisors/description) medium
Sum of exactly four-divisors of each number #medium #math
👍1
# 05.01.2026
[1975. Maximum Matrix Sum](https://leetcode.com/problems/maximum-matrix-sum/description) medium
Max sum after multiply -1 adjacent cells #medium #brainteaser
[1975. Maximum Matrix Sum](https://leetcode.com/problems/maximum-matrix-sum/description) medium
Max sum after multiply -1 adjacent cells #medium #brainteaser
👍1
# 06.01.2026
[1161. Maximum Level Sum of a Binary Tree](https://leetcode.com/problems/maximum-level-sum-of-a-binary-tree/description) medium
Min level max sum in tree #medium
[1161. Maximum Level Sum of a Binary Tree](https://leetcode.com/problems/maximum-level-sum-of-a-binary-tree/description) medium
Min level max sum in tree #medium
👍1
# 07.01.2026
[1339. Maximum Product of Splitted Binary Tree](https://leetcode.com/problems/maximum-product-of-splitted-binary-tree/description) medium
Max sumA*sumB of a tree split #medium
[1339. Maximum Product of Splitted Binary Tree](https://leetcode.com/problems/maximum-product-of-splitted-binary-tree/description) medium
Max sumA*sumB of a tree split #medium
👍1
# 08.01.2026
[1458. Max Dot Product of Two Subsequences](https://leetcode.com/problems/max-dot-product-of-two-subsequences/description) hard
Max product of 2 subsequencies #hard #dp
[1458. Max Dot Product of Two Subsequences](https://leetcode.com/problems/max-dot-product-of-two-subsequences/description) hard
Max product of 2 subsequencies #hard #dp
👍1
# 09.01.2026
[865. Smallest Subtree with all the Deepest Nodes](https://leetcode.com/problems/smallest-subtree-with-all-the-deepest-nodes/description) medium
Lowest common ancestor of the deepest nodes #medium
[865. Smallest Subtree with all the Deepest Nodes](https://leetcode.com/problems/smallest-subtree-with-all-the-deepest-nodes/description) medium
Lowest common ancestor of the deepest nodes #medium
❤1👍1
# 10.01.2026
[712. Minimum ASCII Delete Sum for Two Strings](https://leetcode.com/problems/minimum-ascii-delete-sum-for-two-strings/description) medium
Min removed sum to make strings equal #medium #dp
[712. Minimum ASCII Delete Sum for Two Strings](https://leetcode.com/problems/minimum-ascii-delete-sum-for-two-strings/description) medium
Min removed sum to make strings equal #medium #dp
👍1
# 11.01.2026
[85. Maximal Rectangle](https://leetcode.com/problems/maximal-rectangle/description/) hard
Max all-1 rectangle in 2D matrix #hard #monotonic_stack
[85. Maximal Rectangle](https://leetcode.com/problems/maximal-rectangle/description/) hard
Max all-1 rectangle in 2D matrix #hard #monotonic_stack
👍1
# 12.01.2026
[1266. Minimum Time Visiting All Points](https://leetcode.com/problems/minimum-time-visiting-all-points/description) easy
Euclid travel distance #easy #brainteaser
[1266. Minimum Time Visiting All Points](https://leetcode.com/problems/minimum-time-visiting-all-points/description) easy
Euclid travel distance #easy #brainteaser
👍1
# 12.01.2026
[3453. Separate Squares I](https://leetcode.com/problems/separate-squares-i/description/) medium
Min Y to split into equal areas #medium #bs
[3453. Separate Squares I](https://leetcode.com/problems/separate-squares-i/description/) medium
Min Y to split into equal areas #medium #bs
👍1
# 14.01.2026
[3454. Separate Squares II](https://leetcode.com/problems/separate-squares-ii/description/) hard
Min y to equal split areas exclude intersections #hard #line_sweep
[3454. Separate Squares II](https://leetcode.com/problems/separate-squares-ii/description/) hard
Min y to equal split areas exclude intersections #hard #line_sweep
👍1🔥1
# 15.01.2026
[2943. Maximize Area of Square Hole in Grid](https://leetcode.com/problems/maximize-area-of-square-hole-in-grid/description) medium
Max square area after removing bars in a grid #medium #intervals
[2943. Maximize Area of Square Hole in Grid](https://leetcode.com/problems/maximize-area-of-square-hole-in-grid/description) medium
Max square area after removing bars in a grid #medium #intervals
👍1
# 16.01.2026
[2975. Maximum Square Area by Removing Fences From a Field](https://leetcode.com/problems/maximum-square-area-by-removing-fences-from-a-field/description/) medium
Max square after remove vertical or horizontal bars #medium
[2975. Maximum Square Area by Removing Fences From a Field](https://leetcode.com/problems/maximum-square-area-by-removing-fences-from-a-field/description/) medium
Max square after remove vertical or horizontal bars #medium
👍1
# 17.01.2026
[3047. Find the Largest Area of Square Inside Two Rectangles](https://leetcode.com/problems/find-the-largest-area-of-square-inside-two-rectangles/description) medium
Max square in intersection #medium
[3047. Find the Largest Area of Square Inside Two Rectangles](https://leetcode.com/problems/find-the-largest-area-of-square-inside-two-rectangles/description) medium
Max square in intersection #medium
👍1