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Channel Posts
# 30.06.2026
1358. Number of Substrings Containing All Three Characters
medium
Substrings with 3 letters
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/-TTBLi0EltY
| 2 |  # 29.06.2026
1967. Number of Strings That Appear as Substrings in Word
easy
N patterns in a word
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/b6MqVSIzuIQ | 64 |
| 3 |  # 28.06.2026
1846. Maximum Element After Decreasing and Rearranging
medium
Max possible grow of +0 or +1
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/EeSZMRdxiM0 | 78 |
| 4 |  # 27.06.2026
3020. Find the Maximum Number of Elements in Subset
medium
Powers of two symmetrical exponentially growing longest sequence length
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/SObyptIwXkE | 99 |
| 5 |  # 26.06.2026
3739. Count Subarrays With Majority Element II
hard
Subarrays with majority element
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/Ej-Equz8M_M | 101 |
| 6 |  # 25.06.2026
3737. Count Subarrays With Majority Element I
medium
Subarrays with majority element
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/Aua17hAHSsg | 116 |
| 7 |  # 24.06.2026
3700. Number of ZigZag Arrays II
hard
Ways to make l..r zigzag sequence
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/y33AHlHLF3E | 116 |
| 8 |  # 23.06.2026
3699. Number of ZigZag Arrays I
hard
Ways to make l..r zigzag sequence
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/4ARmo1QHhB8 | 125 |
| 9 |  # 22.06.2026
1189. Maximum Number of Balloons
easy
Count "balloon"s in stirng
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/6UzICTD3ATU | 116 |
| 10 |  # 21.06.2026
1833. Maximum Ice Cream Bars
medium
Max count by given coins
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/XH5RbKScx04 | 104 |
| 11 |  # 20.06.2026
1840. Maximum Building Height
hard
Max growing height with restrictions
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/To5TLl_lvGQ | 101 |
| 12 |  # 19.06.2026
1732. Find the Highest Altitude
easy
Max running sum
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/xqogcMssIaQ | 96 |
| 13 |  # 18.06.2026
1344. Angle Between Hands of a Clock
medium
Angle between clock arrows
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/Wq31E31505Y | 101 |
| 14 |  # 17.06.2026
3614. Process String with Special Operations II
hard
K-th char ina pattern-build a string, %-reverse, #-repeat, *-pop
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/vrFeFK_b5lU | 98 |
| 15 |  # 16.06.2026
3612. Process String with Special Operations I
medium
Pattern-build a string, %-reverse, #-repeat, *-pop
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/FRj0YKp_f7c | 129 |
| 16 |  # 15.06.2026
2095. Delete the Middle Node of a Linked List
medium
Remove the middle of Linked LIst
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/_ZUzITaa0vI | 129 |
| 17 |  # 14.06.2026
2130. Maximum Twin Sum of a Linked List
medium
Max sum pairwise from tail
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/218om3UJuZI | 134 |
| 18 |  # 13.06.2026
3838. Weighted Word Mapping
easy
Convert words to chars by weighting their sums and reversing
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/asQKj_XI-y8 | 152 |
| 19 |  # 12.06.2026
3559. Number of Ways to Assign Edge Weights II
hard
Ways to color the all queries paths a..b in tree
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/EwfsrTTu_NU | 150 |
| 20 |  # 11.06.2026
3558. Number of Ways to Assign Edge Weights I
medium
Ways to color the deepest path in tree
blog: https://dmitrysamoylenko.com/leetcode/
youtube: https://youtu.be/jWSiyPJdCcU | 151 |
