| [Home|Training|Problems|Contests|C Language] | [Login|Register] |
|
Problems Status Rank Statistics |
Problem D
Ugly number
Time Limit: 1000ms
Memory Limit: 65536kb Description
A number is called 'ugly number' if and only if it is composed of digit 2 or 5 or 8. So the first ten 'ugly number' are: 2 5 8 22 25 28 52 55 58 82.Now, we define two functions: next(x) : the minimum 'ugly number ' greater or equal to x. pre(x) : the maximum 'ugly number ' smaller or equal to x. For example, next(3)=5, pre(24)=22. Given an interval [S, D] (S<=D), can you compute the value of TT, defined as: 
Input
The input consists of multiple test cases. The first line, an integer T (1<=T<=100), indicates the number of test cases. Each test case has only one line, containing two numbers S and D, in which: 2<=S<=100000000 S<=D<=100000000 Output
Output the answer of each case.
Sample Input
1 2 4 Sample Output
6 Hint
next(2)-pre(2)+next(3)-pre(3)+next(4)-pre(4)=2-2+5-2+5-2=6
|