// 9.7

import java.util.Scanner;

public class MagicSquare{

   public static void main (String[] args){
      // Set up the array and input the data
      Scanner reader = new Scanner(System.in);
      int square[][] = new int[4][4];
      int dataCount = 0, row = 0, col = 0;
      while (row < 4){
         dataCount++;
         System.out.print("Enter the number at (" + row + "," + col + "): ");
         int data = reader.nextInt();
         square[row][col] = data;
         col++;
         if (col == 4){
            row++;
            col = 0;
         }
      }
      displayResults(square);
   }
            
   private static void displayResults(int square[][]){
      displayList(square);
      if (magicSquare(square))
         System.out.println("\nThis is a magic square");
      else
         System.out.println("\nThis is not a magic square");
  }
    
   private static void displayList(int a[][]){
      for (int row = 0; row < a.length; row++)
         for (int col = 0; col < a.length; col++){
            System.out.print(String.format("%3d", a[row][col]) + " ");
            if (col == a.length - 1)
               System.out.println("");
         }
   }
    //Complete this section
   private static boolean magicSquare(int a[][]){













   }
    
   private static int colSum(int a[][], int col){
      int sum = 0;
      for (int row = 0; row < a.length; row++)
         sum = sum + a[row][col];
      return sum;
   }
    
   private static int rowSum(int a[][], int row){
      int sum = 0;
      for (int col = 0; col < a.length; col++)
         sum = sum + a[row][col];
      return sum;
   }
    
   private static int diagSum(int a[][], int row, int col){
      int sum = 0;
      int j = 0;
      if (row == col)
         // top left to bottom right
         for (int i = 0; i < a.length; i++){    
              sum = sum + a[i][j];
              j++;
         }
      else
         // bottom left to top right
         for (int i = a.length - 1; i >= 0; i--){  
            sum = sum + a[i][j];
            j++;
         }         
      return sum;
   }
}