I am new at python...I write this code. This is a uri problem and problem no 1478.Here the uri problem link:https://www.urionlinejudge.com.br/ju...lems/view/1478
My code:
Code:
while(1):
    N=int(input())
    if(N==0):
        break
    
    mainlist=[]
    for i in range(0,N):
        sublist=[]
        for j in range(0,N):
            sublist.append(9)
        mainlist.append(sublist)
...