这样写有问题？
sum = 0 x = 1 n = 1 while True: y = 0 y = n while y>0: x *= 2 y -= 1 sum += x n += 1 if n >= 20: break print sum 为什么不对
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sum = 0 x = 1 n = 1 while True: y = 0 y = n while y>0: x *= 2 y -= 1 sum += x n += 1 if n >= 20: break print sum 为什么不对
2016-08-27
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