Discussion @ 2137. Dynamic string complexity @ Timus Online Judge

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ADMIN!	coder	2137. Dynamic string complexity	9 Jul 2026 22:45	1
ADMIN! coder 9 Jul 2026 22:45 Please, check 142 test, C++ fread failed for this test case. scanf accepted. After fread I can try trim space symbols (ASCII code <= 32) from start and end, any more WA142.
How solve it O(N) ?	coder	2137. Dynamic string complexity	9 Jul 2026 22:09	1
How solve it O(N) ? coder 9 Jul 2026 22:09

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Discussion of Problem 2137. Dynamic string complexity