#include using namespace std; using ll=long long; #define rep2(i, a, n) for(int i = (a); i < (n); i++) #define rep(i, n) rep2(i,0,n) int main(){ cin.tie(nullptr);ios_base::sync_with_stdio(false); cout<>a>>b>>c; if(a==0&&b==0&&c==0){ cout<<-1<0){ double x=(b>0?-b-sqrt(d)/2*a:-b+sqrt(d)/2*a); cout<<2<