this works and shows exact same output but don't know why the compiler doesnt recognise it

import java.util.Scanner;

public class Solution {

public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("================================");
        for(int i=0;i<3;i++){
            String s1=sc.next();
            int x=sc.nextInt();
            System.out.print(s1+"\t\t");
            System.out.printf("%03d",x);
            System.out.println();
        }
        System.out.println("================================");

}

}