Challenges

Rotate Array
You are given an array of N length. You have to rotate the array right...
Max. Marks: 6
Solved By : 983
Floating Number
Bob has a floating point number N. He wants to set the precision for 2...
Max. Marks: 4
Solved By : 4573
SwapMaster solves Symmetric Swap
The SwapMaster is known to be the greatest and fastest swapper of all ...
Max. Marks: 4
Solved By : 3957
String Matching
Cody has a sequence of characters N. He likes a sequence if it contain...
Max. Marks: 3
Solved By : 2125
Leap Year
Steve is playing a quiz game with his brother John. As Steve just lear...
Max. Marks: 6
Solved By : 3313
Project Teams
There are N students in a class and Teacher want to divide these stude...
Max. Marks: 5
Solved By : 4078
Circle of Numbers
All numbers in NumberLand are standing in a circle for a dancing cerem...
Max. Marks: 6
Solved By : 2815
Happy String
A happy string is a string in which each character is lexicographicall...
Max. Marks: 4
Solved By : 2099
Degree Celsius
Tom is a scientist. He uses huge machines for complex calculations. Th...
Max. Marks: 4
Solved By : 4761
Three's Company
This problem requires you to create a output string from input string ...
Max. Marks: 4
Solved By : 3135
Symmetric Matrix
Please select a challenge
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: 336

Maximum Marks: 12