Challenges
Problem Statement
Given a matrix of dimensions N x N.
Print "YES"(without quotes) if it is a symmetric matrix, else print "NO"(without quotes).
Input
First line contains N.
Each of following N lines contains N integers each, denoting the matrix.
Output
Print the required answer.
Constraints
1 <= N <= 100
1 <= matrix_element <= 100
Sample Input
3 1 0 0 0 2 1 0 1 1
Sample Output
YES
Dcoded By: Saurav Chandra
Solved By: 532
Maximum Marks: 12