Олимпиадный тренинг

Задача 7114. Error


A natural number N is given (N<=15). Fill and display a square two-dimensional NxN array according to the following rule:
 1  0  0
 1  1  1  0
 1  1  1  1

Each element of the array is separated from another by one space, each line of the array is displayed on a new line
Sample Input and Output
Test No. Input data Imprint
1 5
 0   0  0 
 0   0  0 
1  0 0
1 1 1 0
1 1 1 1