Pattern

Program to output below pattern?

1:  #include <stdio.h>  
2:  void main(void)  
3:   {  
4:       int i,j;  
5:       for(i = 1 ; i < 5 ; i++)   
6:       {  
7:            for(j = 1 ; j <= i ; j++)  
8:            {  
9:                  if((j % 2) == 0)   
10:                        printf("1 ");  
11:                  else  
12:                        printf("0 ");  
13:            }  
14:            printf("\n");  
15:       }  
16:  }   

Output: