結果
問題 | No.955 ax^2+bx+c=0 |
ユーザー | ei1333333 |
提出日時 | 2019-12-18 00:35:56 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 3 ms / 2,000 ms |
コード長 | 2,977 bytes |
コンパイル時間 | 2,343 ms |
コンパイル使用メモリ | 206,456 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-09-18 21:59:09 |
合計ジャッジ時間 | 4,527 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 |
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testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 1 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 3 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 1 ms
5,376 KB |
testcase_16 | AC | 1 ms
5,376 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 1 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 2 ms
5,376 KB |
testcase_26 | AC | 2 ms
5,376 KB |
testcase_27 | AC | 1 ms
5,376 KB |
testcase_28 | AC | 1 ms
5,376 KB |
testcase_29 | AC | 2 ms
5,376 KB |
testcase_30 | AC | 2 ms
5,376 KB |
testcase_31 | AC | 2 ms
5,376 KB |
testcase_32 | AC | 2 ms
5,376 KB |
testcase_33 | AC | 1 ms
5,376 KB |
testcase_34 | AC | 2 ms
5,376 KB |
testcase_35 | AC | 2 ms
5,376 KB |
testcase_36 | AC | 1 ms
5,376 KB |
testcase_37 | AC | 2 ms
5,376 KB |
testcase_38 | AC | 2 ms
5,376 KB |
testcase_39 | AC | 2 ms
5,376 KB |
testcase_40 | AC | 1 ms
5,376 KB |
testcase_41 | AC | 2 ms
5,376 KB |
testcase_42 | AC | 1 ms
5,376 KB |
testcase_43 | AC | 2 ms
5,376 KB |
testcase_44 | AC | 2 ms
5,376 KB |
testcase_45 | AC | 1 ms
5,376 KB |
testcase_46 | AC | 1 ms
5,376 KB |
testcase_47 | AC | 1 ms
5,376 KB |
testcase_48 | AC | 1 ms
5,376 KB |
testcase_49 | AC | 2 ms
5,376 KB |
testcase_50 | AC | 2 ms
5,376 KB |
testcase_51 | AC | 2 ms
5,376 KB |
testcase_52 | AC | 2 ms
5,376 KB |
testcase_53 | AC | 2 ms
5,376 KB |
testcase_54 | AC | 1 ms
5,376 KB |
testcase_55 | AC | 2 ms
5,376 KB |
testcase_56 | AC | 2 ms
5,376 KB |
testcase_57 | AC | 2 ms
5,376 KB |
testcase_58 | AC | 1 ms
5,376 KB |
testcase_59 | AC | 2 ms
5,376 KB |
testcase_60 | AC | 2 ms
5,376 KB |
testcase_61 | AC | 1 ms
5,376 KB |
testcase_62 | AC | 1 ms
5,376 KB |
testcase_63 | AC | 2 ms
5,376 KB |
testcase_64 | AC | 2 ms
5,376 KB |
testcase_65 | AC | 2 ms
5,376 KB |
testcase_66 | AC | 1 ms
5,376 KB |
testcase_67 | AC | 1 ms
5,376 KB |
testcase_68 | AC | 2 ms
5,376 KB |
testcase_69 | AC | 2 ms
5,376 KB |
testcase_70 | AC | 2 ms
5,376 KB |
testcase_71 | AC | 1 ms
5,376 KB |
testcase_72 | AC | 2 ms
5,376 KB |
testcase_73 | AC | 1 ms
5,376 KB |
testcase_74 | AC | 2 ms
5,376 KB |
testcase_75 | AC | 2 ms
5,376 KB |
testcase_76 | AC | 2 ms
5,376 KB |
testcase_77 | AC | 2 ms
5,376 KB |
testcase_78 | AC | 2 ms
5,376 KB |
testcase_79 | AC | 2 ms
5,376 KB |
testcase_80 | AC | 2 ms
5,376 KB |
testcase_81 | AC | 2 ms
5,376 KB |
testcase_82 | AC | 2 ms
5,376 KB |
testcase_83 | AC | 2 ms
5,376 KB |
testcase_84 | AC | 2 ms
5,376 KB |
testcase_85 | AC | 2 ms
5,376 KB |
testcase_86 | AC | 2 ms
5,376 KB |
testcase_87 | AC | 2 ms
5,376 KB |
testcase_88 | AC | 1 ms
5,376 KB |
testcase_89 | AC | 2 ms
5,376 KB |
testcase_90 | AC | 2 ms
5,376 KB |
testcase_91 | AC | 2 ms
5,376 KB |
testcase_92 | AC | 2 ms
5,376 KB |
testcase_93 | AC | 2 ms
5,376 KB |
testcase_94 | AC | 2 ms
5,376 KB |
testcase_95 | AC | 2 ms
5,376 KB |
testcase_96 | AC | 1 ms
5,376 KB |
testcase_97 | AC | 2 ms
5,376 KB |
testcase_98 | AC | 1 ms
5,376 KB |
testcase_99 | AC | 2 ms
5,376 KB |
testcase_100 | AC | 2 ms
5,376 KB |
testcase_101 | AC | 1 ms
5,376 KB |
testcase_102 | AC | 1 ms
5,376 KB |
testcase_103 | AC | 1 ms
5,376 KB |
testcase_104 | AC | 2 ms
5,376 KB |
testcase_105 | AC | 2 ms
5,376 KB |
testcase_106 | AC | 1 ms
5,376 KB |
testcase_107 | AC | 2 ms
5,376 KB |
testcase_108 | AC | 2 ms
5,376 KB |
testcase_109 | AC | 2 ms
5,376 KB |
testcase_110 | AC | 2 ms
5,376 KB |
testcase_111 | AC | 2 ms
5,376 KB |
testcase_112 | AC | 2 ms
5,376 KB |
testcase_113 | AC | 2 ms
5,376 KB |
testcase_114 | AC | 2 ms
5,376 KB |
testcase_115 | AC | 2 ms
5,376 KB |
testcase_116 | AC | 1 ms
5,376 KB |
testcase_117 | AC | 2 ms
5,376 KB |
testcase_118 | AC | 2 ms
5,376 KB |
testcase_119 | AC | 2 ms
5,376 KB |
testcase_120 | AC | 2 ms
5,376 KB |
testcase_121 | AC | 2 ms
5,376 KB |
testcase_122 | AC | 1 ms
5,376 KB |
testcase_123 | AC | 2 ms
5,376 KB |
testcase_124 | AC | 2 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using int64 = long long; const int mod = 1e9 + 7; // const int mod = 998244353; const int64 infll = (1LL << 62) - 1; const int inf = (1 << 30) - 1; struct IoSetup { IoSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); cerr << fixed << setprecision(15); } } iosetup; template< typename T1, typename T2 > ostream &operator<<(ostream &os, const pair< T1, T2 > &p) { os << p.first << " " << p.second; return os; } template< typename T1, typename T2 > istream &operator>>(istream &is, pair< T1, T2 > &p) { is >> p.first >> p.second; return is; } template< typename T > ostream &operator<<(ostream &os, const vector< T > &v) { for(int i = 0; i < (int) v.size(); i++) { os << v[i] << (i + 1 != v.size() ? " " : ""); } return os; } template< typename T > istream &operator>>(istream &is, vector< T > &v) { for(T &in : v) is >> in; return is; } template< typename T1, typename T2 > inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); } template< typename T1, typename T2 > inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); } template< typename T = int64 > vector< T > make_v(size_t a) { return vector< T >(a); } template< typename T, typename... Ts > auto make_v(size_t a, Ts... ts) { return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...)); } template< typename T, typename V > typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) { t = v; } template< typename T, typename V > typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) { for(auto &e : t) fill_v(e, v); } template< typename F > struct FixPoint : F { FixPoint(F &&f) : F(forward< F >(f)) {} template< typename... Args > decltype(auto) operator()(Args &&... args) const { return F::operator()(*this, forward< Args >(args)...); } }; template< typename F > inline decltype(auto) MFP(F &&f) { return FixPoint< F >{forward< F >(f)}; } using ld = long double; const ld eps = 1e-20; std::vector< ld > quadratic_equation(ld a, ld b, ld c) { ld d = b * b - 4 * a * c; if(std::abs(a) < eps) return std::abs(b) > eps ? std::vector< ld >{-c / b} : std::vector< ld >{}; if(d < -eps) return {}; if(d < eps) return {-b / (2 * a), -b / (2 * a)}; int sign = (b >= 0) ? 1 : -1; ld x0 = (-b - sign * sqrt(std::abs(d))) / (2 * a), x1 = c / (a * x0); if(x0 > x1) std::swap(x0, x1); return {x0, x1}; } int main() { ld a, b, c; cin >> a >> b >> c; if(a == 0) { if(b != 0) { cout << 1 << endl; cout << -c / b << endl; } else if(c == 0) { cout << -1 << endl; } else { cout << 0 << endl; } } else { auto ret = quadratic_equation(a, b, c); if(ret.size() >= 2 && abs(ret[0] - ret[1]) < eps) ret.pop_back(); cout << ret.size() << endl; sort(begin(ret), end(ret)); for(auto &p : ret) cout << p << endl; } }