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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.     double a,b,c,d;
  7.     cin >> a >> b >> c;
  8.     d = b*b - 4 * a * c;
  9.     if(int(a)==0 && int(b)==0 && int(c)==0){
  10.         return cout << -1,0;
  11.     }
  12.     if(int(a)==0)
  13.         return cout << 1 << '\n' << fixed << setprecision(6) << -c/b,0;
  14.     if(d<0){
  15.         cout << 0;
  16.     } else {
  17.         if(int(d)==0){
  18.             cout << 1 << fixed << setprecision(6) << -b/(2*a);
  19.         } else {
  20.             d = sqrt(d);
  21.             cout << 2 << '\n' << fixed << setprecision(6) << (-b+d)/(2*a) << '\n' << (-b-d)/(2*a);
  22.         }
  23.     }
  24.  
  25. }
Success #stdin #stdout 0s 3472KB
comments (?)
stdin
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0 -1 6
stdout
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1
6.000000
https://ideone.com/J8YUuK
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
secret

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