結果

問題 No.955 ax^2+bx+c=0
ユーザー PachicobuePachicobue
提出日時 2019-12-18 00:17:51
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
実行時間 -
コード長 5,919 bytes
コンパイル時間 1,753 ms
コンパイル使用メモリ 206,580 KB
実行使用メモリ 6,948 KB
最終ジャッジ日時 2024-07-06 23:38:32
合計ジャッジ時間 4,154 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
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 1 ms
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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 1 ms
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testcase_05 AC 1 ms
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testcase_06 AC 1 ms
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testcase_07 AC 1 ms
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testcase_08 AC 1 ms
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testcase_09 AC 1 ms
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testcase_10 AC 1 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 1 ms
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testcase_14 AC 1 ms
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testcase_15 AC 1 ms
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testcase_16 AC 1 ms
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testcase_17 AC 1 ms
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testcase_18 AC 1 ms
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testcase_19 AC 1 ms
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testcase_20 AC 1 ms
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testcase_21 AC 1 ms
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testcase_22 AC 1 ms
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testcase_23 AC 1 ms
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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
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testcase_30 AC 1 ms
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testcase_31 AC 2 ms
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testcase_32 AC 1 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 AC 1 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 1 ms
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testcase_62 AC 1 ms
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testcase_63 AC 1 ms
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testcase_64 AC 1 ms
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testcase_65 AC 1 ms
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testcase_66 AC 1 ms
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testcase_67 AC 1 ms
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testcase_68 AC 1 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 1 ms
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testcase_75 AC 1 ms
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testcase_76 AC 1 ms
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testcase_77 AC 2 ms
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testcase_78 AC 1 ms
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testcase_79 AC 1 ms
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testcase_80 AC 1 ms
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testcase_81 AC 1 ms
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testcase_82 AC 2 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 1 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 2 ms
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testcase_92 AC 2 ms
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testcase_93 AC 2 ms
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testcase_94 AC 1 ms
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testcase_95 AC 2 ms
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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 1 ms
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testcase_106 AC 1 ms
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testcase_107 AC 1 ms
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testcase_108 AC 1 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
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testcase_114 AC 1 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 1 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 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
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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>
// created [2019/12/18] 00:09:13
#pragma GCC diagnostic ignored "-Wsign-compare"
#pragma GCC diagnostic ignored "-Wsign-conversion"

using i32   = int32_t;
using i64   = int64_t;
using u32   = uint32_t;
using u64   = uint64_t;
using uint  = unsigned int;
using usize = std::size_t;
using ll    = long long;
using ull   = unsigned long long;
using ld    = long double;
template<typename T, usize n>
using arr = T (&)[n];
template<typename T, usize n>
using c_arr = const T (&)[n];
template<typename T> constexpr T popcount(const T u) { return u ? static_cast<T>(__builtin_popcountll(static_cast<u64>(u))) : static_cast<T>(0); }
template<typename T> constexpr T log2p1(const T u) { return u ? static_cast<T>(64 - __builtin_clzll(static_cast<u64>(u))) : static_cast<T>(0); }
template<typename T> constexpr T msbp1(const T u) { return log2p1(u); }
template<typename T> constexpr T lsbp1(const T u) { return __builtin_ffsll(u); }
template<typename T> constexpr T clog(const T u) { return u ? log2p1(u - 1) : static_cast<T>(u); }
template<typename T> constexpr bool ispow2(const T u) { return u and (static_cast<u64>(u) & static_cast<u64>(u - 1)) == 0; }
template<typename T> constexpr T ceil2(const T u) { return static_cast<T>(1) << clog(u); }
template<typename T> constexpr T floor2(const T u) { return u == 0 ? static_cast<T>(0) : static_cast<T>(1) << (log2p1(u) - 1); }
template<typename T> constexpr bool btest(const T mask, const usize ind) { return static_cast<bool>((static_cast<u64>(mask) >> ind) & static_cast<u64>(1)); }
template<typename T> void bset(T& mask, const usize ind) { mask |= (static_cast<T>(1) << ind); }
template<typename T> void breset(T& mask, const usize ind) { mask &= ~(static_cast<T>(1) << ind); }
template<typename T> void bflip(T& mask, const usize ind) { mask ^= (static_cast<T>(1) << ind); }
template<typename T> void bset(T& mask, const usize ind, const bool b) { (b ? bset(mask, ind) : breset(mask, ind)); }
template<typename T> constexpr T bcut(const T mask, const usize ind) { return ind == 0 ? static_cast<T>(0) : static_cast<T>((static_cast<u64>(mask) << (64 - ind)) >> (64 - ind)); }
template<typename T> bool chmin(T& a, const T& b) { return (a > b ? a = b, true : false); }
template<typename T> bool chmax(T& a, const T& b) { return (a < b ? a = b, true : false); }
constexpr unsigned int mod                  = 1000000007;
template<typename T> constexpr T inf_v      = std::numeric_limits<T>::max() / 4;
template<typename Real> constexpr Real pi_v = Real{3.141592653589793238462643383279502884};
auto mfp = [](auto&& f) { return [=](auto&&... args) { return f(f, std::forward<decltype(args)>(args)...); }; };

template<typename T>
T in()
{
    T v;
    return std::cin >> v, v;
}
template<typename T, typename Uint, usize n, usize i>
T in_v(typename std::enable_if<(i == n), c_arr<Uint, n>>::type) { return in<T>(); }
template<typename T, typename Uint, usize n, usize i>
auto in_v(typename std::enable_if<(i < n), c_arr<Uint, n>>::type& szs)
{
    const usize s = (usize)szs[i];
    std::vector<decltype(in_v<T, Uint, n, i + 1>(szs))> ans(s);
    for (usize j = 0; j < s; j++) { ans[j] = in_v<T, Uint, n, i + 1>(szs); }
    return ans;
}
template<typename T, typename Uint, usize n>
auto in_v(c_arr<Uint, n> szs) { return in_v<T, Uint, n, 0>(szs); }
template<typename... Types>
auto in_t() { return std::tuple<std::decay_t<Types>...>{in<Types>()...}; }
struct io_init
{
    io_init()
    {
        std::cin.tie(nullptr), std::ios::sync_with_stdio(false);
        std::cout << std::fixed << std::setprecision(20);
    }
} hogechan;

template<typename T>
int out(const T& v) { return std::cout << v, 0; }
template<typename T>
int out(const std::vector<T>& v)
{
    for (usize i = 0; i < v.size(); i++) {
        if (i > 0) { std::cout << ' '; }
        out(v[i]);
    }
    return std::cout << "\n", 0;
}
template<typename T1, typename T2>
int out(const std::pair<T1, T2>& v) { return out(v.first), std::cout << ' ', out(v.second), 0; }
template<typename T, typename... Args>
int out(const T& v, const Args... args) { return out(v), std::cout << ' ', out(args...), 0; }
template<typename... Args>
int outln(const Args... args) { return out(args...), std::cout << '\n', 0; }
template<typename... Args>
void outel(const Args... args) { return out(args...), std::cout << std::endl, 0; }
#    define SHOW(...) static_cast<void>(0)
constexpr ull TEN(const usize n) { return n == 0 ? 1ULL : TEN(n - 1) * 10ULL; }

template<typename T, typename Uint, usize n, usize i>
auto make_v(typename std::enable_if<(i == n), c_arr<Uint, n>>::type, const T& v = T{}) { return v; }
template<typename T, typename Uint, usize n, usize i>
auto make_v(typename std::enable_if<(i < n), c_arr<Uint, n>>::type szs, const T& v = T{})
{
    const usize s = (usize)szs[i];
    return std::vector<decltype(make_v<T, Uint, n, i + 1>(szs, v))>(s, make_v<T, Uint, n, i + 1>(szs, v));
}
template<typename T, typename Uint, usize n>
auto make_v(c_arr<Uint, n> szs, const T& t = T{}) { return make_v<T, Uint, n, 0>(szs, t); }
int main()
{
    const auto [A, B, C] = in_t<ll, ll, ll>();
    const auto [a, b, c] = std::tuple<ld, ld, ld>(A, B, C);
    if (A == 0) {
        if (B == 0) {
            if (C == 0) {
                return outln(-1);
            } else {
                return outln(0);
            }
        } else {
            outln(1);
            return outln(-c / b);
        }
    } else {
        const ll D = B * B - 4LL * A * C;
        const ld d = D;
        if (D < 0) {
            return outln(0);
        } else if (D == 0) {
            outln(1);
            return outln(-b / (2 * a));
        } else {
            outln(2);
            ld x1 = (-b - std::sqrt(d)) / (2 * a);
            ld x2 = (-b + std::sqrt(d)) / (2 * a);
            if (x1 > x2) { std::swap(x1, x2); }
            outln(x1);
            return outln(x2);
        }
    }
    return 0;
}
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