Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

C. Classy Numbers

time limit per test

3 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputLet's call some positive integer classy if its decimal representation contains no more than $$$3$$$ non-zero digits. For example, numbers $$$4$$$, $$$200000$$$, $$$10203$$$ are classy and numbers $$$4231$$$, $$$102306$$$, $$$7277420000$$$ are not.

You are given a segment $$$[L; R]$$$. Count the number of classy integers $$$x$$$ such that $$$L \le x \le R$$$.

Each testcase contains several segments, for each of them you are required to solve the problem separately.

Input

The first line contains a single integer $$$T$$$ ($$$1 \le T \le 10^4$$$) — the number of segments in a testcase.

Each of the next $$$T$$$ lines contains two integers $$$L_i$$$ and $$$R_i$$$ ($$$1 \le L_i \le R_i \le 10^{18}$$$).

Output

Print $$$T$$$ lines — the $$$i$$$-th line should contain the number of classy integers on a segment $$$[L_i; R_i]$$$.

Example

Input

4

1 1000

1024 1024

65536 65536

999999 1000001

Output

1000

1

0

2

Codeforces (c) Copyright 2010-2019 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Oct/18/2019 17:59:42 (f2).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|