結果
問題 | No.955 ax^2+bx+c=0 |
ユーザー |
|
提出日時 | 2021-01-03 19:59:58 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,379 bytes |
コンパイル時間 | 4,197 ms |
コンパイル使用メモリ | 251,968 KB |
最終ジャッジ日時 | 2025-01-17 09:30:18 |
ジャッジサーバーID (参考情報) |
judge5 / judge5 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 1 WA * 2 |
other | AC * 24 WA * 98 |
ソースコード
#include<bits/stdc++.h> #include<atcoder/all> using namespace std; using namespace atcoder; typedef long long ll; typedef long double ld; typedef pair<ll,ll> P; typedef pair<int,int> Pi; #define rep(i,n) for(ll i=0;i<n;i++) #define FOR(i,a,b) for(ll i=a;i<b;i++) #define rrep(i,n) for(ll i=n-1;i>=0;i--) #define rFOR(i,a,b) for(ll i=a-1;i>=b;i--) #define fi first #define se second #define endl "\n" istream &operator>>(istream &is, modint998244353 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint998244353 &a) { return os << a.val(); } istream &operator>>(istream &is, modint1000000007 &a) { long long v; is >> v; a = v; return is; } ostream &operator<<(ostream &os, const modint1000000007 &a) { return os << a.val(); } template<typename T> inline bool chmax(T &a, T b){if(a<b){a=b;return true;}return false;} template<typename T> inline bool chmin(T &a, T b){if(a>b){a=b;return true;}return false;} template<typename T> ostream& operator<<(ostream& s,const complex<T>& d) {return s<<"("<<d.real()<<", "<<d.imag()<< ")";} template<typename T1, typename T2> ostream& operator<<(ostream& s,const pair<T1,T2>& d) {return s<<"("<<d.first<<", "<<d.second<<")";} template<typename T> ostream& operator<<(ostream& s, const vector<T>& d){int len=d.size();rep(i,len){s<<d[i];if(i<len-1) s<<" ";}return s;} template<typename T> ostream& operator<<(ostream& s,const vector<vector<T>>& d){int len=d.size();rep(i,len){s<<d[i]<<endl;}return s;} template<typename T> ostream& operator<<(ostream& s,const set<T>& v){s<<"{ ";for(auto itr=v.begin();itr!=v.end();++itr) {if (itr!=v.begin()) {s<< ", ";}s<<(*itr);}s<<" }";return s;} template<typename T> ostream& operator<<(ostream& s,const multiset<T>& v){s<<"{ ";for(auto itr=v.begin();itr!=v.end();++itr) {if (itr!=v.begin()) {s<< ", ";}s<<(*itr);}s<<" }";return s;} template<typename T1, typename T2> ostream& operator<<(ostream& s,const map<T1,T2>& m){s<<"{"<<endl;for(auto itr=m.begin();itr!=m.end();++itr){s<<" "<<(*itr).first<<" : "<<(*itr).second<<endl;}s<<"}"<<endl;return s;} template<class T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); } template<class... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); } const ll mod=1'000'000'007; const ll inf=1'000'000'000'000'000'00; const int INF=1'000'000'000; const double EPS=1e-10; const double PI=acos(-1); void solve(){ ll a,b,c; cin>>a>>b>>c; if(a==0){ if(b==0){ if(c==0){ cout<<-1<<endl; }else{ cout<<0<<endl; } }else{ cout<<setprecision(15)<<1<<' '<<double(-c)/double(b)<<endl; } }else{ ll d=b*b-4*a*c; if(d<0) cout<<0<<endl; else if(d==0){ cout<<setprecision(15)<<1<<' '<<double(-b)/double(2*a)<<endl; }else{ double tmp=sqrt(d); double ans1,ans2; if(b>=0){ ans1=(-b-tmp)/double(2*a); ans2=c/(a*ans1); }else{ ans1=(-b+tmp)/double(2*a); ans2=c/(a*ans1); } if(ans1>ans2) swap(ans1,ans2); cout<<setprecision(15)<<2<<' '<<ans1<<' '<<ans2<<endl; } } } int main(){ cin.tie(0);ios::sync_with_stdio(false); int t=1; while(t--) solve(); }