bebakhshid yadam raft begam age k+1 aval bashe
m=1.2.3....k,a=a1
adade donbalaeie farz ro dar (a.k+d)[SUP][1.2.3...k].t[/SUP] zarb mikonim pas age (k+1).t=m.t+1 ye javab dashte bashe hale ke unam badihie chon (k+1) avale
baraye k+1 gheire avalam ke = p+g ye estedlale moshabeh ke d ro =d+ga gharar midim.