Codeforces Round #166 (Div. 2) 271D
Codeforces Round #166 (Div. 2) 271D
Problem Description
You’ve got string s, consisting of small English letters. Some of the English letters are good, the rest are bad.
A substring s[l…r] (1 ≤ l ≤ r ...
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2019-08-09 13:07:05 ·
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