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It's hard to understand the problem definition. Does the string we look for need to be at the beginning of the strings? What are we trying to optimize?
- Leonid99 February 15, 2016So, supposing that we are looking only for prefixes, `input[]` is huge and we are optimizing for the fast counting of prefixes, you could save `input` into a trie and keep in the trie nodes the amount of strings with this prefix.