Binary Triangle
Print a triangle of alternating ones and zeros.
Input format
One line with a single integer N (the size of the pattern).
Output format
Print N rows; row i has i cells that alternate, and each row starts with 1 (cell value is 1 when row+col is even).
Constraints
- Values fit in a 64-bit signed integer
- Trailing whitespace and a trailing newline are ignored by the judge
Read from stdin, write to stdout. Sample cases below show the exact format.
Sample cases
Example 1
Input
4Expected output
1
01
101
0101Example 2
Input
5Expected output
1
01
101
0101
10101