Diagonal Difference
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import java.util.*;
class Main {
public static void main(String[] args) {
List<List<Integer>> arr = new ArrayList<>();
arr.add(Arrays.asList(1,2,3));
arr.add(Arrays.asList(4,5,6));
arr.add(Arrays.asList(9,8,9));
int firstDiagonal = 0;
int secondDiagonal = 0;
int length = arr.size();
for(int i = 0; i < length; i++){
firstDiagonal += arr.get(i).get(i);
secondDiagonal += arr.get(i).get(length - i - 1);
}
System.out.println(Math.abs(firstDiagonal - secondDiagonal));
}
}
Java
INFO