Works fine in the IDE, but not when i upload it.
import java.util.Scanner;
public class Main{
public static void main(String[] args) {
int a;
int b;
Scanner input = new Scanner(System.in);
String f = input.nextLine();
String[] s = f.split(" ");
a = Integer.parseInt(s[0]);
if (s.length - 1 >= 1) {
b = Integer.parseInt(s[1]);
int k;
for (k = a; k < b; k++) {
boolean primecheck = true;
for (int j = 2; j < k; j++) {
if (k % j == 0) {
primecheck = false;
}
}
if (primecheck) {
if(k == 1){
}else {
System.out.println(k);
}
}
}
}else if(a != 2){
b = a;
a = 1;
int k;
for (k = a; k < b; k++) {
boolean primecheck = true;
for (int j = 2; j < k; j++) {
if (k % j == 0) {
primecheck = false;
}
}
if (primecheck) {
if(k == 1){
}else {
System.out.println(k);
}
}
}
}else{
System.out.println(2);}
}
}
