def f(seq, num):
    arr = [0]*1000
    arr[0] = 1

    index = 0
    for count, n in zip(range(2,num), seq):
        back = index-n
        forw = index+n
        if back >= 0 and arr[back]==0:
            arr[back]=count
            index=back
        elif arr[forw]==0:
            arr[forw]=count
            index=forw
        else:
            print(f"Stuck at {n}: {index}.")
    return arr

\22+\222]+]2:+1+:++!:++2:+*+1+0+[-*-*+02]+]2{*+++**+}+0!:+*+1+0+
:+*+1+!!:+++0+0+:+0+0+0!{*++1+0 + ]+]+]+]+]+]+]+]+]+]+]+]+]+]+]+]

int i = 0;
int x = 0;
for(i = 0; i <4; i++);
  x++;
  if(x == 3)
    System.out.println(“*”);