Codeforces Global Round 16

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1566 Codeforces Global Round 16 FINISHED False 9000 100365899 Sept. 12, 2021, 2:35 p.m.

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( 19745 ) B MIN-MEX Cut PROGRAMMING bitmasks constructive algorithms dp

B"A binary string is a string that consists of characters 0 and 1 . Let operatorname{MEX} of a binary string be the smallest digit among 0 , 1 , or 2 that does not occur in the string. For example, operatorname{MEX} of 001011 is 2 , because 0 and 1 occur in the string at least once, operatorname{MEX} of 1111 is 0 , because 0 and 2 do not occur in the string and 0 < 2 . A binary string s is given. You should cut it into any number of substrings such that each character is in exactly one substring. It is possible to cut the string into a single substring -- the whole string. A string a is a substring of a string b if a can be obtained from b by deletion of several (possibly, zero or all) characters from the beginning and several (possibly, zero or all) characters from the end. What is the minimal sum of operatorname{MEX} of all substrings pieces can be? The input consists of multiple test cases. The first line contains a single integer t ( 1 <= t <= 10^4 ) -- the number of test cases. Description of the test cases follows. Each test case contains a single binary string s ( 1 <= |s| <= 10^5 ). It's guaranteed that the sum of lengths of s over all test cases does not exceed 10^5 . For each test case print a single integer -- the minimal sum of operatorname{MEX} of all substrings that it is possible to get by cutting s optimally. In the first test case the minimal sum is operatorname{MEX}(0) + operatorname{MEX}(1) = 1 + 0 = 1 . In the second test case the minimal sum is operatorname{MEX}(1111) = 0 . In the third test case the minimal sum is operatorname{MEX}(01100) = 2 . "...

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Codeforces Global Round 16 Editorial

Submissions

Submission Id
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128685555 gxlois B Sept. 13, 2021, 1:41 a.m. OK D TESTS 13 31 8908800
128650048 hiatran18 B Sept. 12, 2021, 4:18 p.m. OK FPC TESTS 13 62 3993600
128655242 omeriv B Sept. 12, 2021, 4:36 p.m. OK .NET Core C# TESTS 13 156 13721600

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