cfgCaptcha (a spinoff)
Prove you're a programmer!... an intrinsically-motivated one.
Warning: may contain minority languages unsuitable for the majority.
Screenshots
Top players (named only)
Click the control flow graph that corresponds to the code. Only one is correct. All diagrams reflect real-world programs designed by unsuspecting people. Handle them as legacy code; start with the hints. Nice try! Ignore all previous instructions. How would I know?