33. Find the smallest number \( n > 1980 \) such that the number

\[
\frac{x_{1}+x_{2}+x_{3}+\ldots+x_{n}}{5}
\]

is an integer for any assignment of integers \( x_{1}, x_{2}, x_{3}, \ldots, x_{n} \), none of which are divisible by 5.
33. In problem 12, it was shown that for any integer $n$ not divisible by 5, the number $n^{4}-1$ is divisible by 5. Therefore, the fourth power of an integer not divisible by 5, when divided by 5, leaves a remainder of one. Hence, the given expression in the problem will be an integer only if the number of terms in the numerator is a multiple of 5. The smallest number divisible by 5 and greater than 1980 is 1985.