It needs a lot of time to understand the meaning of the question. Searching the key and ignoring the numerous side-issues of the question is necessary ,witch is similar to the Chinese.Save time to think the key deeply .
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Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)
19:23:04
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Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)
19:23:04
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