\javaSource "./";

\programVariables {
   int i;
   Node n,m,k;
   Node[] na;
}

\problem {
   \<{ n = m; } \> n = m
 & (n != null -> \<{ n.next = m; }\> n.next = m)
 
 
 & (n != null & k.next = n -> 
 \<{ n.next = m; }\> (n.next = m & k.next=n))
 
 
 
 & (na != null & i >=0 & i < na.length ->
   \<{ na[i] = m; }\> na[i] = m)
}