20 lines
309 B
Python
20 lines
309 B
Python
n = int(input())
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coordinates = [0, 0, 0]
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for _ in range(n):
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x, y, z = [int(d) for d in input().split(' ')]
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coordinates[0] += x
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coordinates[1] += y
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coordinates[2] += z
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check = True
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for i in coordinates:
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if i != 0:
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check = False
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if check:
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print("YES")
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else:
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print("NO")
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