如果一个操作数是无符号整数，另外一个操作数是有符号整数，那么表达式的结果就是无符号整数。
If one of the operands is unsigned and the other is a signed int, the expression becomes an unsigned.
如果我们能够确定其中的一个操作数为unsigned，那么使用无符号除法将会更好，因为它要比有符号除法快得多。
It will be better to use unsigned division by ensuring that one of the operands is unsigned, as this is faster than signed division.
如果在表达式中混合使用无符号和有符号的32位整数，并将其赋值给一个有符号的long类型，那么将其中一个操作数转换成64位的类型。
In cases where unsigned and signed 32-bit integers are mixed in an expression and assigned to a signed long, cast one of the operands to its 64-bit type.
基于符号数字负二进制表达，提出了任意字长操作数的并行两步加法与一步减法。
Based on sign digit negabinary representation, the two step addition and one step subtraction of arbitrary length operands can be performed.
基于符号数字负二进制表达，提出了任意字长操作数的并行两步加法与一步减法。
Based on sign digit negabinary representation, the two step addition and one step subtraction of arbitrary length operands can be performed.
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