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In addition to that, the problem states that |Si−Si−1|=|Ri−Ri−1|. Whatever the value in between both the bars "| value |" means that we take the positive value of it even if its negative.
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Funny String
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In addition to that, the problem states that |Si−Si−1|=|Ri−Ri−1|. Whatever the value in between both the bars "| value |" means that we take the positive value of it even if its negative.