DCP-191: Counting Multiples Back to All Problems

Easy Math > Number Theory


Oishi will give you 2 integers N & K. You have to tell her how many N digit counting numbers are divisible by K. Suppose for N = 2 and K = 10 , we see that the 2 digits numbers are from 10 to 99 and only 9 of them is divisible by 10. So the answer is 9. Input: ------ Input starts with an integer **T (1<=1000)**, denoting the number of test cases. Each case contains two integer **N (2 ≤ N ≤ 9)** denoting the number of digits and **K (1 ≤ K ≤ 999999999)** denoting the divisible integer. Output: ------- Output how many counting numbers of digit N is divisible by K. Sample Input ------------ 2 2 10 3 3 Sample Output ------------- 9 300


Problem Setter:

Sifat Siddiqi Shishir

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Problem Limits

Language Time Limit (seconds)
C 1.00
C++ 1.00
C++14 1.00
C# 3.00
Go 3.00
Java 3.00
JavaScript 3.00
Objective-C 3.00
Perl 3.00
PHP 3.00
Python 3.00
Python3 3.00
Ruby 3.00
VB.Net 3.00

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