dario-dsa's blog

Problem with CF task
By dario-dsa, 11 years ago, In English

HI, I am having problem with figure it a fast way to solve this problem so can anyone help me?
http://codeforces.net/contest/243/problem/A

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11 years ago, # |
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For each R, there are at most log(106) distinct values of F(L, R). For k-th bit, we find max(i | i <= R and (bit k in a[i] = 1)). These will be all possible values of L.

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