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Omni-MATH / Determine the number of subsets S of {1,2,…,1000} that satisfy the following conditions: - S has 19 elements, and - the sum of the elements in any non-empty subset of S is not divi…

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problem

Determine the number of subsets SS of {1,2,…,1000}\{1,2, \ldots, 1000\} that satisfy the following conditions: - SS has 19 elements, and - the sum of the elements in any non-empty subset of SS is not divisible by 20 .
Plain-text mathematical notation (without MathML)
Determine the number of subsets S of {1,2,…,1000} that satisfy the following conditions: - S has 19 elements, and - the sum of the elements in any non-empty subset of S is not divisible by 20 .
Original LaTeX notation
Determine the number of subsets $S$ of $\{1,2, \ldots, 1000\}$ that satisfy the following conditions: - $S$ has 19 elements, and - the sum of the elements in any non-empty subset of $S$ is not divisible by 20 .

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