4141
Practice
3.9 (59 votes)
Approved
Easy
Math
Number theory
Open
Problem
56% Success 9314 Attempts 30 Points 1s Time Limit 256MB Memory 1024 KB Max Code
Link to Russian translation of problem
The statement of this problem is very simple: you are given a non-negative integer X. Whether it's divisible by 41?
Input
The first line contains one integer T - denoting the number of test cases.
The following T lines contain 4 integers a[0], a1, c, n each and describe each test case:
Let's consider decimal representation of the number X as an array where a[0] is the leftmost (highest) digit. You are given a[0], a1 and each a[i] for 2 <= i <= n-1 can be found by formula:
a[i] = ( a[i - 1]*c + a[i - 2] ) modulo 10
Output
For each test case output YES if the corresponding integer is divisible by 41 and NO otherwise.
Constraints
- T <= 2000
- 1 <=N <= 50000
- 0 <= a[0], a1, c < 10
Submissions
Please login to view your submissions
Similar Problems
Points:30
12 votes
Tags:
EasyMathNumber TheoryNumber theory
Points:30
58 votes
Tags:
ApprovedEasyMathNumber theory
Points:30
19 votes
Tags:
AlgorithmsEuler's totient functionGreatest common divisorMathNumber TheorySieve
Editorial