A square matrix of size N×N is passed as
the input. The program must calculate and print the sum of the elements in the
corners.
Input
Format:
The first line will contain the value of
N. The next N lines will contain the N values separated by one or more spaces.
Output
Format:
The first line will contain the integer
value denoting the sum of the elements in the corners.
Boundary Conditions: 2 <= N <= 20
Example
Input/Output 1:
Input:
3
10 90 1 4 22 5 32 8 66
Output:
109
Explanation:
The sum = 10+1+66+32 = 109
Solution:
n=int(input())
a=[[int(i) for i in input().split()]for _
in range(n)]
print(a[0][0]+a[0][n-1]+a[n-1][0]+a[n-1][n-1])