Advent of Code

[Adrian Matoga via Digitalmars-d]

On Wednesday, 2 December 2015 at 03:50:20 UTC, Charles wrote:
(..)
>
>     auto input = "arbitrarily long string of '(' and ')'";
>
>     int floor;
>     foreach(movement; input)
>         floor += (movement == '(' ? 1 : -1);
>
>     writeln(floor);

Speak D to me, please.
	stdin.byLine.front.map!(a => a.predSwitch('(', 1, ')', -1, 
0)).sum.writeln;