Given an integer N and a matrix A of dimensions NxN.Swap the values of the triangle above the primary diagonal with the values of the triangle below the primary diagonal.
Example 1:
Input:
N=3
A=[[1,2,3],[4,5,6],[7,8,9]]
Output:
1 4 7
2 5 8
3 6 9
Explanation:
Swapping the upper triangle with the
lower triangle gives this result.
Example 2:
Input:
N=4
A=[[2,7,3,1],[10,1,5,1],[10,4,7,6],[6,9,1,8]]
Output:
2 10 10 6
7 1 4 9
3 5 7 1
1 1 6 8
Explanation:
Swapping upper triangle with the
lower triangle leads to this result.
Your Task:
You don't need to read input or print anything. Your task is to complete the function swapTriangle() which takes the integer N and matrix A as input parameters and returns a matrix with the upper and lower triangles swapped.
Expected Time Complexity:O(N^{2})
Expected Auxillary Space:O(1)

Constraints:
1<=N,A[i][j]<=1000, for 0<=i

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