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Lucky Digits and Modulo

Practice

4 (155 votes)

Mathematics

Lucky Digit

Easy

Simple Math

Problem

64% Success 5210 Attempts 20 Points 1s Time Limit 256MB Memory 1024 KB Max Code

Given a number N find out the minimum number M such that result of N modulo M become either 4 or 7 . Input: First line of input contains number of test cases T . Each test case contains a single integer N . Output: Print the minimum value of M such that result of N%M become either 4 or 7 if there is no any value of M exists then print -1 . Constraints: 1 <= T <= 10 3 1 <= N <= 10 9

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