Problem Statement

Count Magic Numbers in a Range For integers `L` and `R`, count the numbers in the inclusive range `[L, R]` whose decimal representation contains every digit `2`, `3`, `5`, and `7` at least once. Input Format One line containing `L R`. Output Format Print the count. Constraints `1 < L < R < 10^18` Notes Leading zeroes are not part of a number's decimal representation. This explicit all-four-digits reading reconstructs the incomplete source phrase "should contain 2 3 5 7".