int nbFlt = …;
int nbGate = …;

range Gate 1 .. nbGate;
range Flt 1 .. nbFlt;

var
   int assign[Flt,Gate] in 0..1,
   int y[Flt,Flt] in 0..1;

float+ arrtm[Flt] = …;
float+ dptm[Flt] = …;
//var float+ interval[Flt, Flt];
                     
minimize
     sum (i in Flt, j in Flt : arrtm[j] - dptm[i] >0 & (j-i<=70 \/ i-j<=70) ) y[i,j] / (arrtm[j] - dptm[i])
      //sum (i in Flt, j in Flt : arrtm[j] - dptm[i] >0 /\ (j-i<=70 \/ i-j<=70 ) y[i,j] *(-1)* (arrtm[j] - dptm[i])
 
 
subject to {
   
           //forall(i in Flt, j in Flt : ij )
          //– forall(i in Flt, j in Flt : j-i<=70 \/ i-j<=70 )
            forall(i in Flt, j in Flt : arrtm[j] - dptm[i] >0 => j-i<=70 \/ i-j<=70  )
             {
              //i j;
              sum(k in Gate)assign[i,k] * assign[j,k] = y[i,j];        
               };
               
            forall(i in Flt)
            sum(k in  Gate) assign[i,k] = 1;
                    
           
           //forall(i in Flt, j in Flt)
          //   i j;
                     
           };