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https://math.stackexchange.com/questions/48682/maximization-with-xor-operator

this will help you.
On P_Nyagolov → Dynamic Segment Trees, 10 years ago
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can someone tell me why am i wrong?

http://ideone.com/BxPXmD
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can someone good man explain me problem D more detail? i mean to tell me clear dp state
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thanks for great explanation.
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can someone explain more detail problem E?thanks.
On darkshadows → DP on Trees Tutorial, 10 years ago
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in problem 2 why f[v]=1 when we have only 1 vertex?
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is it can to solve qtree without hld? for example with centroid decomposition or some other technique?
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in problem frank sinatra, can i quickly find minimal number,that is not present in given set.
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can it gives me tle,if i can't use weight compress?
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can someone explain problem E more clearly?,thanks.
On Arpa → [Tutorial] Sack (dsu on tree), 10 years ago
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can someone tell me how 208E is solved with this technique? thanks a lot.
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can't understand why we ans+=cnt[prefix[x]^k] what gives me prefix[x]^k?
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Ok