Олимпиадный тренинг

Задача 7123. Sum on the diagonals


Input: The program receives as input the number N <= 15, which is the number of rows and columns in the array. Next, the input stream contains N lines of N numbers that are elements of the array.

Input: The program should output
1) the word YES - if the sum of the elements located on the main diagonal is greater than the sum of the elements located on the secondary diagonal
2) word NO - if condition 1 is not met

Examples
# Input Output
1
3
24 23 5 
27 19 6 
15 16 25 
YES
2
3
17 20 18 
25 9 26 
30 4 11
NO