However, the collation would be wrong when the number of digits changed, so leading zeroes are provided.

不过，如果数字的位数发生了变化，整理就会发生错误，所以要给出前导的零。

youdao

We don't want decimal numbers with fewer than four digits - excluding leading zeroes - so that 2992 is the first correct answer.

我们不想十进制数字少于四位数-不含前导零，2992是第一个正确答案。

youdao

You can translate the resulting mask back into a single index by counting the leading zeroes, and then subtracting that from 31. A possible assembly language instruction sequence to do this would be

计算前导零，然后从 31 中减去前导零数量，就可以将产生的掩码转换为索引。

youdao