Editorial
Japanese Editorial
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A - Make M
B - Exactly Three Bits
C - Dyed by Majority (Odd Tree)
D - Everywhere is Sparser than Whole (Construction)
E - Not Dyed by Majority (Cubic Graph)
- Official Editorial by evima
- Official Supplement by ygussany
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Practical Proof During Contest by
i_am_noob
F - Everywhere is Sparser than Whole (Judge)
- Official Editorial by ygussany
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Similar Problem by i_am_noob