Whats the game path

I've just installed counter strike source and im not sure what the game path is so i can put it on xfire i think its something like C:/Program Files/Steam but i've tried that and it said:

Quote:

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Unable to find the following files:
C:\Program Files\Steam\SteamApps\*\counter-strike source\HL2.exe
for game Counter-Strike Source.
Please double check the path, and try again.

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