That's the problem. I usually use 3 hours to correct the counting mistake.
这就是问题，我通常花3个小时来修正数数错误。
Automatic counting of steel bars is a difficult problem in steel production.
棒材自动计数是钢材生产中的一个难题。
Solve each problem by addition, skip-counting and multiplication.
用加法、跳跃计数和乘法解答以下各题。
At the end of this paper, we study the problem of counting Max-heaps.
最后，对最大值堆的枚举计数进行了深入的研究。
At the end of this paper, we study the problem of counting Max-heaps.
最后，对最大值堆的枚举计数进行了深入的研究。
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