1
n = int(input())
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3
x = [0 for i in range(n)]
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y = [0 for i in range(n)]
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z = [0 for i in range(n)]
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for i in range(n):
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    x[i], y[i], z[i] = map(int, input().split())
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if sum(x) == 0 and sum(y) == 0 and sum(z) == 0:
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    print('YES')
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else:
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    print('NO')