How i can learn from such as this problem 1705D - Mark and Lightbulbs
I need help.
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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
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Rayan Programming Contest 2024 - Selection (Codeforces Round 989, Div. 1 + Div. 2)
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This kind of problems is required to find any observations so the only way to be good in this is practice. Solve more such problems.