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for s in iter(input, "0"):
  print(s)
  
# Input
# 123
# 55
# 1000
# 0

# Output

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# buildings[4][3][10]
buildings = [[[0 for i in range(10)] for j in range(3)] for k in range(4)]

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a = 123.456789
b = round(a, 3)
print(b)

# => 123.457

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a = divmod(10, 3)
print(a)

# => (3, 1)

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l = ['a', 'b', 'c']
for i, c in enumerate(l, start=1):
    print(i, c)

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print(100 / 3) # 33.333333
print(100 // 3) # 33

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a = 5

b = a / 2
print(b) #=> 2.5

c = a >> 1
print(c) #=> 2

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def call():
  print('call')

for i in range(0, N):
  for j in range(i+1, N):
    call()
    
# Q. callは何回呼ばれるか？
# A. N-1, N-2, ..., 1の和なので、(N-1) * N / 2

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def test():
    A = [5,2,4,6,1,3]
    print(A)

    for i in range(1, len(A)):
        print('A', A)
        v = A[i]

        # search insert position
        j = i - 1

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A = set([1,2,3])
B = set([2,3,4])
A ^ B
=> set([1, 4])