input:P1(3,0,30),P2(6,1,300),P3(18,1,300),P4(,0,300), N(40,1,100);k:=2;A1:=ref(h,N)=hhv(h,2*N+1);B1:=filter(A1,N);C1:=bkset(B1,N+1);D1:=filter(C1,n);{}A2:=ref(l,N)=llv(l,2*N+1);B2:=filter(A2,N);C2:=backset(B2,N+1);D2:=filter(C2,N);{}E1:=(ref(llv(l,2*N),1)+ref(hhv(h,2*N),1))/2; E2:=(h+l)/2;{高低点出现在同一上时可作取舍}H1:=(D1 AND not(D2 AND E1>=E2)) OR barstatus=2 OR barscount(c)=1;L1:=(D2 AND not(D1 AND E1=E2);X1:=ref(baast(H1),1)+1; F1:=backset(H1 AND count(L1,X1)>0,llvbars(if(L1,l,10000),X1));G1

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