(31337_22037524510182, `
The way this game represents negative is called "two's complement". It is the standard way to represent negative numbers in modern computers. Some key insights for understanding two's compliment:
 1: To go between the negative and positive, you can flip all the bits and add 1.
 2: If the highest bit is [T], the value is always negative.
 3: Adders work in both signed and unsigned mode.
 4: There is only 1 way to write each number.

In the early days of computing, the main contender to two's complement was one's complement. Its main advantage is that changing the sign of a number is simple, you just NOT each bit in the number. However, it has 2 representations for 0, a positive and a negative, which complicates comparisons.

Another interesting representation, perhaps worth looking up is base -2, where the sign of the value of each digit alternates between positive and negative.
`)