#409805 (C++14) No.955 ax^2+bx+c=0

提出ソース

結果

問題	No.955 ax^2+bx+c=0
ユーザー	hitonanode
提出日時	2019-12-18 02:53:37
言語	C++14 (gcc 12.3.0 + 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	1,753 ms
コンパイル使用メモリ	167,336 KB
実行使用メモリ	5,376 KB
最終ジャッジ日時	2024-09-18 22:06:40
合計ジャッジ時間	3,959 ms
ジャッジサーバーID （参考情報）	judge2 / judge3

このコードへのチャレンジ
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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
testcase_00	AC	2 ms 5,248 KB
testcase_01	AC	1 ms 5,376 KB
testcase_02	AC	1 ms 5,376 KB
testcase_03	AC	2 ms 5,376 KB
testcase_04	AC	1 ms 5,376 KB
testcase_05	AC	2 ms 5,376 KB
testcase_06	AC	2 ms 5,376 KB
testcase_07	AC	2 ms 5,376 KB
testcase_08	AC	2 ms 5,376 KB
testcase_09	AC	2 ms 5,376 KB
testcase_10	AC	2 ms 5,376 KB
testcase_11	AC	2 ms 5,376 KB
testcase_12	AC	1 ms 5,376 KB
testcase_13	AC	2 ms 5,376 KB
testcase_14	AC	2 ms 5,376 KB
testcase_15	AC	2 ms 5,376 KB
testcase_16	AC	2 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	2 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	2 ms 5,376 KB
testcase_28	AC	2 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	2 ms 5,376 KB
testcase_34	AC	2 ms 5,376 KB
testcase_35	AC	2 ms 5,376 KB
testcase_36	AC	2 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	2 ms 5,376 KB
testcase_41	AC	2 ms 5,376 KB
testcase_42	AC	2 ms 5,376 KB
testcase_43	AC	2 ms 5,376 KB
testcase_44	AC	2 ms 5,376 KB
testcase_45	AC	2 ms 5,376 KB
testcase_46	AC	2 ms 5,376 KB
testcase_47	AC	2 ms 5,376 KB
testcase_48	AC	2 ms 5,376 KB
testcase_49	AC	2 ms 5,376 KB
testcase_50	AC	1 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	2 ms 5,376 KB
testcase_55	AC	1 ms 5,376 KB
testcase_56	AC	1 ms 5,376 KB
testcase_57	AC	1 ms 5,376 KB
testcase_58	AC	2 ms 5,376 KB
testcase_59	AC	1 ms 5,376 KB
testcase_60	AC	1 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	1 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	1 ms 5,376 KB
testcase_69	AC	2 ms 5,376 KB
testcase_70	AC	1 ms 5,376 KB
testcase_71	AC	2 ms 5,376 KB
testcase_72	AC	2 ms 5,376 KB
testcase_73	AC	2 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	1 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	1 ms 5,376 KB
testcase_87	AC	1 ms 5,376 KB
testcase_88	AC	1 ms 5,376 KB
testcase_89	AC	1 ms 5,376 KB
testcase_90	AC	1 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	2 ms 5,376 KB
testcase_97	AC	1 ms 5,376 KB
testcase_98	AC	2 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	2 ms 5,376 KB
testcase_103	AC	1 ms 5,376 KB
testcase_104	AC	1 ms 5,376 KB
testcase_105	AC	2 ms 5,376 KB
testcase_106	AC	2 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	1 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	2 ms 5,376 KB
testcase_117	AC	2 ms 5,376 KB
testcase_118	AC	1 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	2 ms 5,376 KB
testcase_123	AC	2 ms 5,376 KB
testcase_124	AC	1 ms 5,376 KB

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ソースコード

raw source code

#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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結果

テストケース

ソースコード