var n, x, i;

fun printArray (x) {
  var elem;
  if x.length == 0
  then skip
  else 
    for i:=0, i<x.length, i:=i+1 do
      write (x[i])
    od
  fi
}

n := read ();

x := [10, 20, 30, 40];

printArray (x);

for i:=0, i<x.length, i:=i+1 do
  x[i] := i
od;

printArray (x)