1
{
2
  n = NF; output = ""; first = 1;
3
  for(i = 1; i <= NF; i++){
4
    coef = $i; exp = n - i + 1;
5
    if(coef == 0) continue;         # pomijamy zero
6
    term = "";
7
    if(first == 0){
8
      if(coef > 0)
9
        term = term "+";
10
      else
11
        term = term "-";
12
    } else {
13
      if(coef < 0)
14
        term = term "-";
15
    }
16
    if(coef < 0)
17
      coef = -coef;
18
    term = term coef;
19
    if(exp > 1)                   # pomijamy x^1
20
      term = term "x^" exp;
21
    output = output term;
22
    first = 0;
23
  }
24
  if(output == "")
25
    output = "0";
26
  print output;
27
}