 Insert at $i=0$.  $A[parent(0)]=A[0]=0 < 0=A[0]$ so we swap $A[0]$ and $A[0]$, giving us the array $$ [0,0,0,00] $$ Insert at $i=0$.  $A[parent(0)]=A[0]=0 < 0=A[0]$ so we swap $A[0]$ and $A[0]$, giving us the array $$ [0,0,0,00] $$ Insert at $i=0$.  $A[parent(0)]=A[0]=0 < 00=A[0]$ so we swap $A[0]$ and $A[0]$, giving us the array $$ [0,0