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Count leading zero/trailing zero in BITSET
By nonrice, history, 12 months ago, In English

How may I perform such operation on bitset, taking advantage of bitset speedup?

It is quite frustrating because such a thing is trivial to implement for a bitset, but designer of std::bitset interface does not allow so.

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12 months ago, # |
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Auto comment: topic has been updated by nonrice (previous revision, new revision, compare).

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12 months ago, # |
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https://codeforces.net/blog/entry/43718

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    12 months ago, # ^ |
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    There is no _Find_last() function, you should've mentioned that.

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12 months ago, # |
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There are a lot of potentially useful stuff that are not implemented in bitset, that's a life. Just write your own implementation, it's not that hard. Would take several hours and a few hundred lines of code thought, but worth it.

Although counting leading zeros is actually possible by using function _Find_first() which finds position of first set bit which equals to number of leading zeroes. But there is no _Find_last() function though.

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    12 months ago, # ^ |
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    Yes, in the end I simply wrote my own.

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12 months ago, # |
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