I dont see the issue
package com.codegym.task.task14.task1420;
/*
GCD
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import static java.lang.Math.*;
public class Solution {
public static void main(String[] args) throws Exception {
ArrayList<Integer> divisors = new ArrayList<>();
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int max = Integer.parseInt(reader.readLine());
int min = Integer.parseInt(reader.readLine());
for (int i = 1; i <= min && i <= max; i++) {
if (max % i == 0 && min % i == 0)
divisors.add(i);
}
int gcd = Collections.max(divisors);
System.out.println("The GCD is: " + gcd);
}
}