P(1)=100000000&100000000&100000000.....(100000000&100000000&100000000&100000000&100000000&100000000&100000000个100000000&).....&100000000,P(2)=100000000&100000000&100000000.....(P(1)个100000000&).....&100000000,P(3)=100000000&100000000&100000000.....(P(2)个100000000&).....&100000000,.............,P(P(P(P(P(P......(1)......) 有P(1)个P=PP(1),PP(2)=100000000&100000000&100000000.....(PP(1)个100000000&).....&100000000,PP(3)=100000000&100000000&100000000.....(PP(2)个100000000&).....&100000000,..............,PP(PP(PP(PP(PP(PP......(1)......) 有PP(1)个PP=PPP(1)