結果

問題 No.955 ax^2+bx+c=0
ユーザー 👑 hitonanodehitonanode
提出日時 2019-12-18 02:53:37
言語 C++14
(gcc 13.2.0 + boost 1.83.0)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 4,343 bytes
コンパイル時間 1,687 ms
コンパイル使用メモリ 168,052 KB
実行使用メモリ 4,348 KB
最終ジャッジ日時 2023-10-19 02:07:33
合計ジャッジ時間 4,626 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
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testcase_02 AC 2 ms
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testcase_03 AC 2 ms
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testcase_04 AC 2 ms
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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
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testcase_10 AC 2 ms
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testcase_11 AC 2 ms
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testcase_12 AC 2 ms
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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
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testcase_19 AC 2 ms
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testcase_20 AC 2 ms
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testcase_21 AC 2 ms
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testcase_22 AC 2 ms
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testcase_23 AC 2 ms
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testcase_24 AC 2 ms
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testcase_25 AC 2 ms
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testcase_26 AC 2 ms
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testcase_27 AC 2 ms
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testcase_28 AC 2 ms
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testcase_29 AC 2 ms
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testcase_30 AC 2 ms
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testcase_31 AC 2 ms
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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
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testcase_36 AC 2 ms
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testcase_37 AC 2 ms
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testcase_38 AC 2 ms
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testcase_39 AC 2 ms
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testcase_40 AC 2 ms
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testcase_41 AC 2 ms
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testcase_42 AC 2 ms
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testcase_43 AC 2 ms
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testcase_44 AC 2 ms
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testcase_45 AC 2 ms
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testcase_46 AC 2 ms
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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
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testcase_52 AC 2 ms
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testcase_53 AC 2 ms
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testcase_54 AC 2 ms
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testcase_55 AC 2 ms
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testcase_56 AC 2 ms
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testcase_57 AC 2 ms
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testcase_58 AC 2 ms
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testcase_59 AC 2 ms
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testcase_60 AC 2 ms
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testcase_61 AC 2 ms
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testcase_62 AC 2 ms
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testcase_63 AC 2 ms
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testcase_64 AC 2 ms
4,348 KB
testcase_65 AC 2 ms
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testcase_66 AC 2 ms
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testcase_67 AC 2 ms
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testcase_68 AC 2 ms
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testcase_69 AC 2 ms
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testcase_70 AC 2 ms
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testcase_71 AC 2 ms
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testcase_72 AC 2 ms
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testcase_73 AC 2 ms
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testcase_74 AC 2 ms
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testcase_75 AC 2 ms
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testcase_76 AC 2 ms
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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
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testcase_93 AC 2 ms
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testcase_94 AC 2 ms
4,348 KB
testcase_95 AC 2 ms
4,348 KB
testcase_96 AC 2 ms
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testcase_97 AC 2 ms
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testcase_98 AC 2 ms
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testcase_99 AC 2 ms
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testcase_100 AC 2 ms
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testcase_101 AC 2 ms
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testcase_102 AC 2 ms
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testcase_103 AC 2 ms
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testcase_104 AC 2 ms
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testcase_105 AC 2 ms
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testcase_106 AC 2 ms
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testcase_107 AC 2 ms
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testcase_108 AC 2 ms
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testcase_109 AC 2 ms
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testcase_110 AC 2 ms
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testcase_111 AC 2 ms
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testcase_112 AC 2 ms
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testcase_113 AC 2 ms
4,348 KB
testcase_114 AC 2 ms
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testcase_115 AC 2 ms
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testcase_116 AC 2 ms
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testcase_117 AC 2 ms
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testcase_118 AC 2 ms
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testcase_119 AC 2 ms
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testcase_120 AC 2 ms
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testcase_121 AC 2 ms
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testcase_122 AC 2 ms
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testcase_123 AC 2 ms
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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 # 

#include <bits/stdc++.h>
using namespace std;
using lint = long long int;
using pint = pair<int, int>;
using plint = pair<lint, lint>;
struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) ((lint)(x).size())
#define POW2(n) (1LL << (n))
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define IFOR(i, begin, end) for(int i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
template<typename T> void ndarray(vector<T> &vec, int len) { vec.resize(len); }
template<typename T, typename... Args> void ndarray(vector<T> &vec, int len, Args... args) { vec.resize(len); for (auto &v : vec) ndarray(v, args...); }
template<typename T> bool mmax(T &m, const T q) { if (m < q) {m = q; return true;} else return false; }
template<typename T> bool mmin(T &m, const T q) { if (m > q) {m = q; return true;} else return false; }
template<typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first + r.first, l.second + r.second); }
template<typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first - r.first, l.second - r.second); }
template<typename T> istream &operator>>(istream &is, vector<T> &vec){ for (auto &v : vec) is >> v; return is; }
///// This part below is only for debug, not used /////
template<typename T> ostream &operator<<(ostream &os, const vector<T> &vec){ os << "["; for (auto v : vec) os << v << ","; os << "]"; return os; }
template<typename T> ostream &operator<<(ostream &os, const deque<T> &vec){ os << "deq["; for (auto v : vec) os << v << ","; os << "]"; return os; }
template<typename T> ostream &operator<<(ostream &os, const set<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T> ostream &operator<<(ostream &os, const unordered_set<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T> ostream &operator<<(ostream &os, const multiset<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec){ os << "{"; for (auto v : vec) os << v << ","; os << "}"; return os; }
template<typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa){ os << "(" << pa.first << "," << pa.second << ")"; return os; }
template<typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp){ os << "{"; for (auto v : mp) os << v.first << "=>" << v.second << ","; os << "}"; return os; }
template<typename TK, typename TV> ostream &operator<<(ostream &os, const unordered_map<TK, TV> &mp){ os << "{"; for (auto v : mp) os << v.first << "=>" << v.second << ","; os << "}"; return os; }
#define dbg(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ") " << __FILE__ << endl;
///// END /////
/*
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/tag_and_trait.hpp>
using namespace __gnu_pbds; // find_by_order(), order_of_key()
template<typename TK> using pbds_set = tree<TK, null_type, less<TK>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename TK, typename TV> using pbds_map = tree<TK, TV, less<TK>, rb_tree_tag, tree_order_statistics_node_update>;
*/



int main()
{
    lint A, B, C;
    cin >> A >> B >> C;
    if (B < 0) A = -A, B = -B, C = -C;
    if (A == 0) {
        if (B == 0 and C == 0) {
            puts("-1");
        }
        else if (B == 0) {
            puts("0");
        }
        else
        {
            cout << 1 << endl;
            cout << -(double)C / B << endl;
        }
    }
    else
    {
        lint D = B * B - 4 * A * C;
        if (D > 0)
        {
            cout << 2 << endl;
            double a = (-4.0 * A * C) / (B + sqrt(D)) / (2 * A);
            double b = (-B - sqrt((double)D)) / (2 * A);
            if (a > b) swap(a, b);
            cout << a << endl;
            cout << b << endl;
        }
        else if (D == 0) {
            cout << 1 << endl;
            cout << -(double)B / (2 * A) << endl;
        }
        else puts("0");
    }
}
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