construct/rlve construct hack interval
construct/rlve construct hack interval: a task in MathConstructOptimize-Envs-harbor (Harbor dataset). Let f(x) be the sum of the decimal digits of x (e.g. f(1234) = 10). Construct integers L and R with 1 <= L <= R <= 310 (that is, 10 31) such that f(L) + f(L+1) + ... + f(R) is divisible by 31.
The task
Let f(x) be the sum of the decimal digits of x (e.g. f(1234) = 10). Construct integers L and R with 1 <= L <= R <= 310 (that is, 10 * 31) such that f(L) + f(L+1) + ... + f(R) is divisible by 31.