Code is Mandatory

An interesting problem sent by a colleague.

King Arthur wishes to marry off his daughter to one of the knights of his land. Being mathematical of mind she set a problem for the knights…

“I invite all the Knights of the land
Place the seats in a circle numbering them from one
Lets the knights choose their seat
Say to the first “You live”
To the second “Off with your head”
To the third “You live”
To the forth “Off with your head”
And so on until one knight remains
This will be the knight I marry”

Which seat would you choose if you were a knight wishing to marry the princess?

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