importmath,sysxy,dp=((0,10),(0,20),(8,26),(15,26),(27,21),(22,12),(10,0),),{}defC(i,j):ifdp.get((i,j),None):returndp[(i,j)]if3>=j:#C(i,j)=0dp[(i,j)]=0else:dp[(i,j)]=sys.maxsizeforkinrange(i+1,i+j