ss:=if(c>ref(c,1) and ref(c,1)>=ref(c,2),1,if(c<ref(c,1) and ref(c,1)<=ref(c,2),-1,if(c>ref(c,2) and ref(c,2)>ref(c,1),2,if(c<ref(c,2) and ref(c,2)<ref(c,1),-2,0)))); sm:=if(ref(ss,1)<>0,ref(ss,1),if(ref(ss,2)<>0,ref(ss,2),if(ref(ss,3)<>0,ref(ss,3),if(ref(ss,5)<>0,ref(ss,5),if(ref(ss,6)<>0,ref(ss,6),if(ref(ss,7)<>0,ref(ss,7),0)))))); 20210311