class Solution { //Function to return sum of upper and lower triangles of a matrix. static ArrayList<Integer> sumTriangles(int matrix[][], int n) { ArrayList<Integer> list=new ArrayList<>(); int sum1=0; int sum2=0; for(int g=0; g<matrix.length; g++){ for(int i=0, j=g; j<matrix.length; i++,j++){ sum1+=matrix[i][j]; } } list.add(sum1); for(int g=0; g<matrix.length; g++){ for(int i=g,j=0; i<matrix.length; i++,j++){ sum2+=matrix[i][j]; } } list.add(sum2); return list; } }
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