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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