1998A - Find K Distinct Points with Fixed Center
Idea
My submission — 275541733
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1998B - Minimize Equal Sum Subarrays
Hint 1
Hint 2
Hint 3
My submission — 275547485
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1998C - Perform Operations to Maximize Score
My solution is a bit overkill, check out neal submission 275613185
Hint 1
Hint 2
My submission — 275635373
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1998E1 - Eliminating Balls With Merging (Easy Version)
Hint 1
Hint 2
Hint 3
Hint 4
My submission — 275608667
Video editorial
1998E2 - Eliminating Balls With Merging (Hard Version)
Hint 1
Hint 2
Hint 3
Hint 4
My submission — 275619707
Video editorial