Why only 2 test cases pass, please find code below

#1

import java.util.*;
public class Main {
public static void main(String args[]) {

Scanner sc = new Scanner(System.in);
int n = sc.nextInt();

	int[] a = new int[n];
	for(int j=0;j<n;j++) {
		a[j] = sc.nextInt();
	}
	
	int m = sc.nextInt();
	
	
	int sum = 0;
	for(int i=0;i<a.length;i++) {
		for(int j=i+1; j<a.length;j++) {
			
			sum = a[i]+a[j];
			
			if(sum==m) {
				System.out.println(a[i]+" "+"and"+" "+a[j]);
			}
		}
	}
}

}