'BEGIN' 'SWITCH' PATH := P1, P2; 'INTEGER' N, I; I := 0; LABEL 1 :; I := I + 1; 'IF' I = 2 'THEN' 'GOTO' STOP; N := 0; 'GOTO' 'IF' P > 0 'THEN' PATH(N) 'ELSE' LABEL 1; P1 := P - 1; P2 := P - 1; STOP :; 'END'