Given a range L, R find total such numbers in the given range such that they have no repeated digits.
12 has no repeated digit.
22 has repeated digit.
102, 194 and 213 have no repeated digit.
212, 171 and 4004 have repeated digits.
Input : 10 12
Output : 2
Explanation : In the given range
10 and 12 have no repeated digit
where as 11 has repeated digit.
Input : 1 100
Output : 90