感觉自测的结果没问题... 求助

N = int(input())
list1 = [0 for i in range(1,N+1)]
list2 = [1 for i in range(1,N+1)]
i = 1
for i in range(1, N+1):
    if i%2 == 0:
        k = int(i/2)
        for j in range(k,i+1):
            list1[j-1] = 1
        for l in list1:
            print(l,end="")
        print('')
    else:
        n = int((i+1)/2)
        for m in range(n-1,i):
            list2[m] = 0
        for l in list2:
            print(l,end="")
        print('')