Ezvor

1067. Digit Count in Range

HardMath Preparing judge… LeetCode
MathDynamic Programming

Hints

Hint 1
Define a function f(x) to get the requested sum from 1 to x. So the answer will be f(hi) - f(lo - 1)
Hint 2
In order to solve f(x) we need to do a DP over digits approach.