#include #define endl "\n" using namespace std; #define ll long long #define ld long double #define rep(i,n) for(int i = 0; i < (int)(n); i++) #define repo(i,n) for(int i = 1; i < (int)(n); i++) #define pb push_back #define mp make_pair #define np next_permutation #define fi first #define se second #define all(x) (x).begin(),(x).end() #define uniq(v) v.erase(unique(v.begin(),v.end()),v.end()) #define lb(v,x) (lower_bound(v.begin(),v.end(),x)-v.begin()) #define ub(v,x) (upper_bound(v.begin(),v.end(),x)-v.begin()) using Pair = pair>; #define pq priority_queue, greater> const ll mod=1000000007; //const ll mod=998244353; const ld pi=acos(-1.0); const ll INF = 1LL<<61; templatebool chmax(T &a, const T &b) { if (abool chmin(T &a, const T &b) { if (b>a>>b>>c; ld han=b*b-4*a*c; cout << fixed << setprecision (20); if(han<0){ cout << "imaginary" << endl; return 0; } if(han==0){ cout << -b/(2*a) << endl; return 0; } ld x=(-b-sqrt(han))/(2*a); ld y=(-b+sqrt(han))/(2*a); if(a>0) cout << x << " " << y << endl; if(a<0) cout << y << " " << x << endl; }