olymmath

INMO 1987 Problem 5

    Find a finite sequence of 16 numbers such that: (a) it reads same from left to right as from right to left. (b) the sum of any 7 consecutive terms is −1-1 , (c) the sum of any 11 consecutive terms is +1+1 .

    Dataset text AI-MO AoPS. Quoted with source.

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