最大流:HDU-4289(CONTROL)

 std

 edge tocnexteMAXE

 sizeheadMAXV

 addedge from to c

   e

        esizetofrom
    esizec
    esizenextheadto
    headtosize

 nmsd costMAXV disMAXVgapMAXVcurMAXVpreMAXV

 SAP_GAP

 cur_flowflow_ansneckutmpi startsenddNn 

        memsetdisdismemsetgapgap

      memsetprepre

iiNi
        curiheadi 

    gapN
    ustart

disstartN

uend

       cur_flowINF

istartiendiecurito

cur_flowecuric
                    cur_flowecuric
                    necki

istartiendiecurito

tmpcuri 

                           etmpccur_flow

                           etmpccur_flow

                     flow_anscur_flow
            uneck

icuruiieinext

eicdisudiseito

i

              curui 

             preeitou 

             ueito

gapdisu 

                  curuheadu

tmpNiheaduiieinext

eic
                    tmpmintmpdiseito 

                  disutmp 

                  gapdisu

ustart    upreu

 flow_ans

 init

 fromto
    size 

   memsetheadhead

  memsetcostcost

         scanfsd

 iini

    scanfcosti 

                addedgeiicosti 

                //addedgeiicosti

 iimi

scanffromto

                  addedgefromtoINF 

                addedgetofromINF

scanfnmEOF

            init 

            printfSAP_GAP