Symmetric_Matrix.java

import java.util.*;
public class main{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int number = input.nextInt();
        int count = 1;
        for(int i=1;i<=number;i++) {
        	input.next();
        	input.next();
        	int num = input.nextInt();
        	long []matrix = new long[num*num];
        	
        	int mid = (num*num+1) / 2;
        	for(int j=0;j<num*num;j++) {
        		matrix[j] = input.nextLong();
        	}
        	
        	int k= 1;
        	boolean check = false;
        	
        	for(int j=0;j<matrix.length;j++) {
        		if(matrix[j] < 0) {
        			check = true;
        			break;
        		}
        	}
        	
        	if(check) {
        		System.out.println("Test #" + count + ": Non-symmetric.");
        		count += 1;
        		continue;
        	}
        	
        	for(int j=0;j<matrix.length;j++) {
        		if(matrix[j] != matrix[matrix.length-k]) {
        			check = true;
        			break;
        		}
        		if(mid == j)
        			break;
        		k++;
        	}
        	
        	if(check) {
        		System.out.println("Test #" + count + ": Non-symmetric.");
        	}
        	else {
        		System.out.println("Test #" + count + ": Symmetric.");
        	}
        	
        	count++;
        }
    }
};