Codeforces Round 690 (Div. 3)

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ContestId
Name
Phase
Frozen
Duration (Seconds)
Relative Time
Start Time
1462 Codeforces Round 690 (Div. 3) FINISHED False 7200 123780299 Dec. 15, 2020, 2:35 p.m.

Problems

Solved$
Index
Name
Type
Tags
Community Tag
Rating
( 27341 ) B Last Year's Substring PROGRAMMING implementation strings

B'Polycarp has a string s[1 ... n] of length n consisting of decimal digits. Polycarp performs the following operation with the string s no more than once (i.e. he can perform operation 0 or 1 time): For example, the string s = "20192020" Polycarp can turn into strings: Polycarp likes the string "2020" very much, so he is wondering if it is possible to turn the string s into a string "2020" in no more than one operation? Note that you can perform zero operations. The first line contains a positive integer t ( 1 <= q t <= q 1000 ) -- number of test cases in the test. Then t test cases follow. The first line of each test case contains an integer n ( 4 <= q n <= q 200 ) -- length of the string s . The next line contains a string s of length n consisting of decimal digits. It is allowed that the string s starts with digit 0. For each test case, output on a separate line: You may print every letter of "YES" and "NO" in any case you want (so, for example, the strings yEs, yes, Yes and YES will all be recognized as positive answer). In the first test case, Polycarp could choose i=3 and j=6 . In the second test case, Polycarp could choose i=2 and j=5 . In the third test case, Polycarp did not perform any operations with the string. '...

Tutorials

Codeforces Round #690 (Div. 3) Editorial

Submissions

Submission Id
Author(s)
Index
Submitted
Verdict
Language
Test Set
Tests Passed
Time taken (ms)
Memory Consumed (bytes)
Tags
Rating
101392258 Debasish1610177113 B Dec. 16, 2020, 7:15 a.m. OK .NET Core C# TESTS 48 93 409600
101400795 ansergeyg B Dec. 16, 2020, 8:45 a.m. OK .NET Core C# TESTS 48 108 819200
101462642 Nidz B Dec. 16, 2020, 9:44 p.m. OK .NET Core C# TESTS 48 109 921600

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