Lexicographical order#4418
We assume that one positive integer is lexicographically smaller than the other, if their representations in the decimal system are lexicographically ordered.
Find the -th number in lexicographically sorted order of all integers from to inclusively.
The first line contains two numbers and (1 \leq k \leq n \leq 10^9).
Print one number - the -th element in lexicographical order of all integers from to inclusively.
Example 1