It really depends what you were doing when the belt snapped, if it was just idling, you might be lucky, but most likely you will have bent valves.
Easiest way to tell is to fit a new belt and see if it starts.
If not, its both heads off, full recondition. Pricey.

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i