Matchsticks game.java

//{ Driver Code Starts
//Initial Template for Java

import java.io.*;
import java.util.*;

class GFG {
    public static void main(String args[]) throws IOException {
        BufferedReader read =
            new BufferedReader(new InputStreamReader(System.in));
        int t = Integer.parseInt(read.readLine());
        while (t-- > 0) {
            Long N = Long.parseLong(read.readLine());

            Solution ob = new Solution();
            System.out.println(ob.matchGame(N));
        }
    }
}
// } Driver Code Ends


//User function Template for Java

class Solution {
    static int matchGame(Long N) {
        // code here
        String s = new String(""+N);
        int lastDigit = Integer.parseInt(""+s.charAt(s.length()-1));
        if(lastDigit % 5 == 0)
        {
          return -1;
        }
        int res = lastDigit % 5;
        return res;
    }
};