結果

問題 No.955 ax^2+bx+c=0
ユーザー Konton7Konton7
提出日時 2020-06-16 01:25:48
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 8,145 bytes
コンパイル時間 2,142 ms
コンパイル使用メモリ 212,812 KB
実行使用メモリ 6,948 KB
最終ジャッジ日時 2024-07-03 11:43:57
合計ジャッジ時間 4,462 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
testcase_00 AC 1 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 1 ms
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testcase_03 AC 2 ms
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testcase_04 AC 1 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 1 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 1 ms
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testcase_12 AC 1 ms
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testcase_13 AC 2 ms
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testcase_14 AC 1 ms
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testcase_15 AC 2 ms
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testcase_16 AC 1 ms
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testcase_17 AC 0 ms
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testcase_18 AC 2 ms
5,376 KB
testcase_19 AC 1 ms
5,376 KB
testcase_20 AC 1 ms
5,376 KB
testcase_21 AC 2 ms
5,376 KB
testcase_22 AC 2 ms
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testcase_23 AC 2 ms
5,376 KB
testcase_24 AC 1 ms
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testcase_25 AC 1 ms
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testcase_26 AC 1 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
5,376 KB
testcase_30 AC 2 ms
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testcase_31 AC 1 ms
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testcase_32 AC 2 ms
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testcase_33 AC 1 ms
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testcase_34 WA -
testcase_35 WA -
testcase_36 WA -
testcase_37 WA -
testcase_38 WA -
testcase_39 WA -
testcase_40 WA -
testcase_41 WA -
testcase_42 WA -
testcase_43 WA -
testcase_44 WA -
testcase_45 WA -
testcase_46 WA -
testcase_47 WA -
testcase_48 WA -
testcase_49 WA -
testcase_50 WA -
testcase_51 WA -
testcase_52 WA -
testcase_53 WA -
testcase_54 WA -
testcase_55 WA -
testcase_56 WA -
testcase_57 WA -
testcase_58 WA -
testcase_59 WA -
testcase_60 AC 1 ms
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testcase_61 AC 2 ms
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testcase_62 AC 1 ms
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testcase_63 WA -
testcase_64 AC 2 ms
5,376 KB
testcase_65 WA -
testcase_66 AC 2 ms
5,376 KB
testcase_67 AC 2 ms
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testcase_68 AC 1 ms
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testcase_69 AC 1 ms
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testcase_70 WA -
testcase_71 AC 1 ms
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testcase_72 AC 1 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
5,376 KB
testcase_77 WA -
testcase_78 WA -
testcase_79 WA -
testcase_80 AC 1 ms
5,376 KB
testcase_81 AC 2 ms
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testcase_82 AC 1 ms
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testcase_83 AC 1 ms
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testcase_84 AC 2 ms
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testcase_85 AC 2 ms
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testcase_86 AC 1 ms
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testcase_87 AC 1 ms
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testcase_88 AC 1 ms
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testcase_89 AC 2 ms
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testcase_90 AC 1 ms
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testcase_91 AC 1 ms
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testcase_92 AC 1 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 2 ms
5,376 KB
testcase_98 AC 2 ms
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testcase_99 AC 2 ms
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testcase_100 AC 1 ms
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testcase_101 AC 2 ms
5,376 KB
testcase_102 AC 1 ms
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testcase_103 AC 2 ms
5,376 KB
testcase_104 AC 2 ms
5,376 KB
testcase_105 AC 2 ms
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testcase_106 AC 2 ms
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testcase_107 AC 1 ms
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testcase_108 AC 2 ms
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testcase_109 AC 1 ms
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testcase_110 AC 1 ms
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testcase_111 AC 2 ms
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testcase_112 AC 1 ms
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testcase_113 AC 1 ms
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testcase_114 AC 2 ms
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testcase_115 AC 1 ms
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testcase_116 AC 1 ms
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testcase_117 AC 2 ms
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testcase_118 AC 1 ms
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testcase_119 AC 1 ms
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testcase_120 AC 2 ms
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testcase_121 AC 1 ms
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testcase_122 WA -
testcase_123 AC 2 ms
5,376 KB
testcase_124 WA -
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ソースコード

diff #

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using VI = vector<int>;
using VL = vector<ll>;
using VS = vector<string>;
using VB = vector<bool>;
using VVI = vector<VI>;
using VVL = vector<VL>;
using PII = std::pair<int, int>;
using PLL = std::pair<ll, ll>;
using TI3 = std::tuple<int, int, int>;
using TI4 = std::tuple<int, int, int, int>;
using TL3 = std::tuple<ll, ll, ll>;
using TL4 = std::tuple<ll, ll, ll, ll>;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define repr(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
#define rep3(i, s, n, d) for (int i = (s); i < (int)(n); i += (d))
#define allpt(v) (v).begin(), (v).end()
#define allpt_c(v) (v).cbegin(), (v).cend()
#define allpt_r(v) (v).rbegin(), (v).rend()

const int mod1 = 1e9 + 7, mod2 = 998244353, mod3 = 1e9 + 9;
const int mod = mod1;
const ll inf = 1e18;

const string wsp = " ";
const string tb = "\t";
const string rt = "\n";

template <typename T>
void show1dvec(const vector<T> &v)
{
    if (v.size() == 0)
        return;
    int n = v.size() - 1;
    rep(i, n) cout << v[i] << wsp;
    cout << v[n] << rt;

    return;
}

template <typename T>
void show2dvec(const vector<vector<T>> &v)
{
    int n = v.size();
    rep(i, n) show1dvec(v[i]);
}

template <typename T, typename S>
void show1dpair(const vector<pair<T, S>> &v)
{
    int n = v.size();
    rep(i, n) cout << v[i].first << wsp << v[i].second << rt;
    return;
}

template <typename T, typename S>
void pairzip(const vector<pair<T, S>> &v, vector<T> &t, vector<T> &s)
{
    int n = v.size();
    rep(i, n)
    {
        t.push_back(v[i].first);
        s.push_back(v[i].second);
    }
    return;
}

template <typename T>
void maxvec(vector<T> &v)
{
    T s = v[0];
    int n = v.size();
    rep(i, n - 1)
    {
        if (s > v[i + 1])
        {
            v[i + 1] = s;
        }
        s = v[i + 1];
    }
}

template <typename T, typename S>
bool myfind(T t, S s)
{
    return find(t.cbegin(), t.cend(), s) != t.cend();
}

bool check(int y, int x, int h, int w)
{
    return 0 <= y && y < h && 0 <= x && x < w;
}

template <typename T>
vector<T> cumsum(const vector<T> &v)
{
    T s = 0;
    vector<T> ret;

    rep(i, v.size())
    {
        s += v[i];
        s %= mod;
        ret.emplace_back(s);
    }
    return ret;
}

bool iskadomatsu(int a, int b, int c)
{
    return (a != b && b != c && c != a) && ((a > b && b < c) || (a < b && b > c));
}

VS split(string s, char c)
{
    VS ret;
    string part;
    s += c;
    rep(i, s.length())
    {
        if (s[i] == c)
        {
            ret.emplace_back(part);
            part = "";
        }
        else if (s[i] != c)
        {
            part += s[i];
        }
    }
    return ret;
}

string removezero(string &s)
{
    string ret;
    for (auto z : s)
        if (z != '0')
            ret += z;
    return ret;
}

ll sumdigit(ll x)
{
    ll ans{0};
    while (x > 0)
    {
        ans += x % 10;
        x /= 10;
    }
    return ans;
}

template <typename T, typename S, typename R>
ll pow_mod(T p, S q, R mod = 1ll)
{
    ll ret = 1, r = p;
    while (q)
    {
        if (q % 2)
            ret *= r, ret %= mod;
        r = (r * r) % mod, q /= 2;
    }
    return ret % mod;
}

template <typename T, typename S>
ll pow_no_mod(T p, S q)
{
    ll ret = 1, r = p;
    while (q)
    {
        if (q % 2)
            ret *= r;
        r = (r * r), q /= 2;
    }
    return ret;
}

void make_frac_tables(VL &frac_list, VL &frac_inv_list)
{
    rep(i, frac_list.size() - 1)
    {
        frac_list[i + 1] *= frac_list[i] * (i + 1);
        frac_list[i + 1] %= mod;
        frac_inv_list[i + 1] *= frac_inv_list[i] * pow_mod(i + 1, mod - 2, mod);
        frac_inv_list[i + 1] %= mod;
    }
}

ll comb(int a, int b, const VL &frac_list, const VL &frac_inv_list)
{
    if (a < b)
        return 0;
    if (b < 0)
        return 0;
    ll ret = frac_list[a];
    ret *= frac_inv_list[b];
    ret %= mod;
    ret *= frac_inv_list[a - b];
    ret %= mod;
    return ret;
}

ll getmedian_double(VL v)
{
    ll ret;
    sort(allpt(v));
    int n = v.size();
    if (n % 2 == 0)
    {
        ret = v[n / 2] + v[n / 2 - 1];
    }
    else
    {
        ret = 2 * v[n / 2];
    }
    return ret;
}

class RangeMinorMaxorSumQuery // 0-index
{
    int const intmax = 2147483647;
    int const intmin = 0;
    vector<int> sgt;
    int n;
    int k;

public:
    RangeMinorMaxorSumQuery(int n1, int f = -1)
    {
        if (f == -1)
            f = intmax;
        else if (f == 0)
            f = intmin;
        int na = 1;
        int ka = 0;
        while (na < n1)
        {
            na *= 2;
            ka++;
        }
        for (int i = 0; i < 2 * na; i++)
            sgt.push_back(f);
        n = na;
        k = ka;
    }

    void update_min(int i, int x)
    {
        i += n;
        sgt[i] = x;
        while (i > 1)
        {
            i /= 2;
            sgt[i] = min(sgt[2 * i], sgt[2 * i + 1]);
        }
    }
    void update_max(int i, int x)
    {
        i += n;
        sgt[i] = x;
        while (i > 1)
        {
            i /= 2;
            sgt[i] = max(sgt[2 * i], sgt[2 * i + 1]);
        }
    }
    void update_sum(int i, int x)
    {
        i += n;
        sgt[i] = x;
        while (i > 1)
        {
            i /= 2;
            sgt[i] = sgt[2 * i] + sgt[2 * i + 1];
        }
    }

    void add_sum(int i, int x)
    {
        i += n;
        sgt[i] += x;
        while (i > 1)
        {
            i /= 2;
            sgt[i] = sgt[2 * i] + sgt[2 * i + 1];
        }
    }

    int getmin(int a, int b, int k = 1, int l = 0, int r = -1) //閉区間 l <= x < r とする
    {
        if (r == -1)
            r = n;
        if (r <= a || b <= l)
            return intmax;
        if (a == l && b == r)
            return sgt[k];
        else
            return min(getmin(a, min(b, (l + r) / 2), 2 * k, l, (l + r) / 2), getmin(max(a, (l + r) / 2), b, 2 * k + 1, (l + r) / 2, r));
    }
    int getmax(int a, int b, int k = 1, int l = 0, int r = -1) //閉区間 l <= x < r とする
    {
        if (r == -1)
            r = n;
        if (r <= a || b <= l)
            return intmin;
        if (a == l && b == r)
            return sgt[k];
        else
            return max(getmax(a, min(b, (l + r) / 2), 2 * k, l, (l + r) / 2), getmax(max(a, (l + r) / 2), b, 2 * k + 1, (l + r) / 2, r));
    }
    int getsum(int a, int b, int k = 1, int l = 0, int r = -1) //閉区間 l <= x < r とする
    {
        if (r == -1)
            r = n;
        if (r <= a || b <= l)
            return intmin;
        if (a == l && b == r)
            return sgt[k];
        else
            return getsum(a, min(b, (l + r) / 2), 2 * k, l, (l + r) / 2) + getsum(max(a, (l + r) / 2), b, 2 * k + 1, (l + r) / 2, r);
    }
    void printsegtree()
    {
        for (int i = 0; i < 2 * n; i++)
        {
            cout << sgt[i] << " ";
        }
        cout << endl;
    }
};



int main()
{

    cin.tie(0);
    ios::sync_with_stdio(false);

#ifdef DEBUG
    cout << "DEBUG MODE" << endl;
    ifstream in("input.txt"); //for debug
    cin.rdbuf(in.rdbuf());    //for debug
#endif

    ll ai, bi, ci;
    double a, b, c, d;
    cin >> ai >> bi >> ci;
    a = 1.0 * ai;
    b = 1.0 * bi;
    c = 1.0 * ci;

    if (a == 0)
    {
        if (b == 0)
        {
            if (c == 0)
            {
                cout << -1 << rt;
            }
            else
            {
                cout << 0 << rt;
            }
        }
        else
        {
            cout << 1 << endl;
            printf("%.12f\n", -c / b);
        }
    }
    else
    {
        if (bi * bi - 4 * ai * ci > 0)
        {
            d = b * b - 4 * a * c;
            cout << 2 << endl;
            printf("%.12f\n", (-b - sqrt(d)) / (2.0 * a));
            printf("%.12f\n", (-b + sqrt(d)) / (2.0 * a));
        }
        else if (bi * bi - 4 * ai * ci == 0)
        {
            cout << 1 << endl;
            printf("%.12f\n", -b / (2.0 * a));
        }
        else
        {
            cout << 0 << rt;
        }
    }

    return 0;
}
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