1234 - 56 - 789 => 389

This is silly but I can't figure out what the solution should be for n = 389, apparently the answer is 2.

123 + 456 + 789 => 1368
123 + 456 - 789 => -210
123 - 456 + 789 => 456
123 - 456 - 789 => -1122

How do we get to 2?

Approved

python new test frameworks

This is perhaps the first such integer: 1125899940397056. For this input, the answer should be 1125899906842624, but it gives 1125899973951489.

And the total number of such safe integers is tens of millions.

This would be interesting in other (bigger?) bases

wow amazing

Nice

nice one

nice!

Good pick up, I completely missed that. Better tests would have punished that mistake.