Ada · version 2012

Run Ada 2012 online

Ada 2012 — run it in a Firecracker microVM on ls-judge. Real toolchain, no wrapper.

Starter code

What you get in Ada 2012

Clicking "Run now" opens the playground with this exact code and a matching test case — passes on first Run.

ada
Ada 2012
with Ada.Text_IO, Ada.Integer_Text_IO;
use Ada.Text_IO, Ada.Integer_Text_IO;
procedure Solution is
   N : Integer;
begin
   Get (N);
   Put (N * 2, Width => 0);
   New_Line;
end Solution;
stdin →21
expected →42
How it runs

How ls-judge runs Ada 2012

Every submission is compiled and executed inside its own Firecracker microVM — the same isolation primitive AWS Lambda uses. No shared container, no shared kernel with other users' code. The Ada 2012toolchain shipped with the microVM is the real thing (not a browser-side emulation): syscalls behave the way they do in production, and the compile / runtime behaviour matches what you would see on your own machine with that version installed.

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