Не могу решить задачу. Подскажите какую нибудь идею. Как решить с помощью дерева отрезков. Заранее спасибо.
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Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
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Codeforces Round 959 sponsored by NEAR (Div. 1 + Div. 2)
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