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Wow you solved all. I think D2 for 2 days and couldn't solve it
@@kimjong-un4521 yeah the reduction to D1 is simple, but requires looking at the problem from a specific angle
Wow you solved all. I think D2 for 2 days and couldn't solve it
@@kimjong-un4521 yeah the reduction to D1 is simple, but requires looking at the problem from a specific angle