def numpat(n):
 
 num=1
 
 for i in range(0, n ):
     num=1 
     for j in range(0, i+1):
         
            print(num , end="")
            num = num +1
            
            
     print("\r")
 
n= int(input ("enter number OF ROWS : "))
numpat(n)
print()