結果

問題 No.955 ax^2+bx+c=0
ユーザー haruki_Kharuki_K
提出日時 2019-12-18 13:22:13
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 3 ms / 2,000 ms
コード長 5,402 bytes
コンパイル時間 1,604 ms
コンパイル使用メモリ 168,228 KB
実行使用メモリ 4,348 KB
最終ジャッジ日時 2023-10-19 02:10:49
合計ジャッジ時間 4,531 ms
ジャッジサーバーID
(参考情報)
judge11 / judge14
このコードへのチャレンジ(β)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
4,348 KB
testcase_01 AC 2 ms
4,348 KB
testcase_02 AC 2 ms
4,348 KB
testcase_03 AC 2 ms
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testcase_04 AC 2 ms
4,348 KB
testcase_05 AC 2 ms
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testcase_06 AC 2 ms
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testcase_07 AC 2 ms
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testcase_08 AC 2 ms
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testcase_09 AC 2 ms
4,348 KB
testcase_10 AC 2 ms
4,348 KB
testcase_11 AC 2 ms
4,348 KB
testcase_12 AC 2 ms
4,348 KB
testcase_13 AC 2 ms
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testcase_14 AC 2 ms
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testcase_15 AC 2 ms
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testcase_16 AC 2 ms
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testcase_17 AC 2 ms
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testcase_18 AC 2 ms
4,348 KB
testcase_19 AC 2 ms
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testcase_20 AC 2 ms
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testcase_21 AC 3 ms
4,348 KB
testcase_22 AC 2 ms
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testcase_23 AC 2 ms
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testcase_24 AC 2 ms
4,348 KB
testcase_25 AC 2 ms
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testcase_26 AC 2 ms
4,348 KB
testcase_27 AC 2 ms
4,348 KB
testcase_28 AC 2 ms
4,348 KB
testcase_29 AC 2 ms
4,348 KB
testcase_30 AC 2 ms
4,348 KB
testcase_31 AC 2 ms
4,348 KB
testcase_32 AC 2 ms
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testcase_33 AC 2 ms
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testcase_34 AC 2 ms
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testcase_35 AC 2 ms
4,348 KB
testcase_36 AC 2 ms
4,348 KB
testcase_37 AC 2 ms
4,348 KB
testcase_38 AC 2 ms
4,348 KB
testcase_39 AC 2 ms
4,348 KB
testcase_40 AC 2 ms
4,348 KB
testcase_41 AC 2 ms
4,348 KB
testcase_42 AC 2 ms
4,348 KB
testcase_43 AC 2 ms
4,348 KB
testcase_44 AC 2 ms
4,348 KB
testcase_45 AC 2 ms
4,348 KB
testcase_46 AC 2 ms
4,348 KB
testcase_47 AC 2 ms
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testcase_48 AC 2 ms
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testcase_49 AC 2 ms
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testcase_50 AC 2 ms
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testcase_51 AC 2 ms
4,348 KB
testcase_52 AC 2 ms
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testcase_53 AC 2 ms
4,348 KB
testcase_54 AC 2 ms
4,348 KB
testcase_55 AC 2 ms
4,348 KB
testcase_56 AC 2 ms
4,348 KB
testcase_57 AC 2 ms
4,348 KB
testcase_58 AC 2 ms
4,348 KB
testcase_59 AC 2 ms
4,348 KB
testcase_60 AC 2 ms
4,348 KB
testcase_61 AC 2 ms
4,348 KB
testcase_62 AC 2 ms
4,348 KB
testcase_63 AC 2 ms
4,348 KB
testcase_64 AC 2 ms
4,348 KB
testcase_65 AC 2 ms
4,348 KB
testcase_66 AC 2 ms
4,348 KB
testcase_67 AC 2 ms
4,348 KB
testcase_68 AC 2 ms
4,348 KB
testcase_69 AC 2 ms
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testcase_70 AC 2 ms
4,348 KB
testcase_71 AC 2 ms
4,348 KB
testcase_72 AC 2 ms
4,348 KB
testcase_73 AC 2 ms
4,348 KB
testcase_74 AC 2 ms
4,348 KB
testcase_75 AC 2 ms
4,348 KB
testcase_76 AC 2 ms
4,348 KB
testcase_77 AC 2 ms
4,348 KB
testcase_78 AC 2 ms
4,348 KB
testcase_79 AC 2 ms
4,348 KB
testcase_80 AC 2 ms
4,348 KB
testcase_81 AC 2 ms
4,348 KB
testcase_82 AC 2 ms
4,348 KB
testcase_83 AC 2 ms
4,348 KB
testcase_84 AC 2 ms
4,348 KB
testcase_85 AC 2 ms
4,348 KB
testcase_86 AC 2 ms
4,348 KB
testcase_87 AC 2 ms
4,348 KB
testcase_88 AC 2 ms
4,348 KB
testcase_89 AC 2 ms
4,348 KB
testcase_90 AC 2 ms
4,348 KB
testcase_91 AC 2 ms
4,348 KB
testcase_92 AC 2 ms
4,348 KB
testcase_93 AC 2 ms
4,348 KB
testcase_94 AC 2 ms
4,348 KB
testcase_95 AC 2 ms
4,348 KB
testcase_96 AC 2 ms
4,348 KB
testcase_97 AC 2 ms
4,348 KB
testcase_98 AC 2 ms
4,348 KB
testcase_99 AC 2 ms
4,348 KB
testcase_100 AC 2 ms
4,348 KB
testcase_101 AC 2 ms
4,348 KB
testcase_102 AC 2 ms
4,348 KB
testcase_103 AC 2 ms
4,348 KB
testcase_104 AC 2 ms
4,348 KB
testcase_105 AC 2 ms
4,348 KB
testcase_106 AC 2 ms
4,348 KB
testcase_107 AC 2 ms
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testcase_108 AC 2 ms
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testcase_109 AC 2 ms
4,348 KB
testcase_110 AC 2 ms
4,348 KB
testcase_111 AC 2 ms
4,348 KB
testcase_112 AC 2 ms
4,348 KB
testcase_113 AC 2 ms
4,348 KB
testcase_114 AC 2 ms
4,348 KB
testcase_115 AC 2 ms
4,348 KB
testcase_116 AC 2 ms
4,348 KB
testcase_117 AC 2 ms
4,348 KB
testcase_118 AC 2 ms
4,348 KB
testcase_119 AC 2 ms
4,348 KB
testcase_120 AC 2 ms
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testcase_121 AC 2 ms
4,348 KB
testcase_122 AC 2 ms
4,348 KB
testcase_123 AC 2 ms
4,348 KB
testcase_124 AC 2 ms
4,348 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

// >>> TEMPLATES
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define int ll
#define double ld
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)
#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)
#define loop(i,a,B) for (int i = a; i B; i++)
#define loopR(i,a,B) for (int i = a; i B; i--)
#define all(x) (x).begin(), (x).end()
#define allR(x) (x).rbegin(), (x).rend()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second
#define INF (numeric_limits<int>::max()/2-1)
#ifdef LOCAL
#define dump(...) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] ", dump_impl(#__VA_ARGS__, __VA_ARGS__)
#define say(x) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] " << x << endl;
#define debug if (1)
void dump_impl(const char*) { cerr << endl; }
template <class T, class... U> void dump_impl(const char *s, T const& x, U const& ...y) { const char *o = "({[", *e = "]})"; for (int i = 0; *s != '\0'; cerr << *s++) { if (count(o,o+3,*s)) i++; if (count(e,e+3,*s)) i--; if (!i && *s == ',') break; } cerr << " = " << x; if (*s == ',') cerr << ", ", s++; dump_impl(s, y...); }
#else
#define dump(...)
#define say(x)
#define debug if (0)
#endif
template <class T> using pque_max = priority_queue<T>;
template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
ostream& operator<<(ostream& os, T const& v) { os << "{"; for (auto const& x : v) os << " " << x; return os << " }"; }
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
template <class T, class S> ostream& operator<<(ostream& os, pair<T,S> const& p) { return os << "(" << p.first << ", " << p.second << ")"; }
template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
template <size_t i, class T> typename enable_if<i >= tuple_size<T>::value>::type output_tuple(ostream&, T const&) { }
template <size_t i = 0, class T> typename enable_if<i < tuple_size<T>::value>::type
output_tuple(ostream& os, T const& t) { os << (i ? " " : "") << get<i>(t); output_tuple<i+1,T>(os,t); }
template <class... T> ostream& operator<<(ostream& os, tuple<T...> const& t) { return output_tuple(os,t), os; }
struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
template <class F> struct FixPoint : private F {
    constexpr FixPoint(F&& f) : F(forward<F>(f)) {}
    template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }
};
struct MakeFixPoint {
    template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }
};
#define MFP MakeFixPoint()|
#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)
template <class T, size_t d> struct vec_impl {
    using type = vector<typename vec_impl<T,d-1>::type>;
    template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }
};
template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;
template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
template <class T> constexpr bool chmin(T& x, T const& y) { if (x > y) { x = y; return true; } return false; }
template <class T> constexpr bool chmax(T& x, T const& y) { if (x < y) { x = y; return true; } return false; }
template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
template <class T> int sz(T const& x) { return x.size(); }
// <<<

int32_t main() {
    int a,b,c; cin >> a >> b >> c;

    if (a == 0) {
        if (b == 0) {
            if (c == 0) {
                quit(-1);
            } else {
                quit(0);
            }
        } else {
            cout << 1 << endl;
            cout << double(-c)/b << endl;
        }
    } else {
        __int128 d = __int128(b)*b - __int128(a)*c*4;
        if (d < 0) {
            quit(0);
        } else if (d == 0) {
            cout << 1 << endl;
            cout << double(-b)/(2*a) << endl;
        } else {
            cout << 2 << endl;
            if (b >= 0) {
                double x = (-sqrt(double(d))-b) /(2*a);
                // double y = (+sqrt(double(d))-b) /(2*a);
                double y = double(-2*c)/(+sqrt(double(d))+b);
                if (a < 0) swap(x,y);
                cout << x << endl;
                cout << y << endl;
            } else {
//                double x = (-sqrt(double(d))-b) /(2*a);
                double x = double(2*c)/(+sqrt(double(d))-b);
                double y = (+sqrt(double(d))-b) /(2*a);
                if (a < 0) swap(x,y);
                cout << x << endl;
                cout << y << endl;
            }
        }
    }

}
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