結果

問題 No.1327 グラフの数え上げ
コンテスト
ユーザー satashun
提出日時 2022-02-23 23:27:40
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 52 ms / 2,000 ms
コード長 4,958 bytes
コンパイル時間 2,142 ms
コンパイル使用メモリ 194,636 KB
最終ジャッジ日時 2025-01-28 01:32:51
ジャッジサーバーID
（参考情報） 		judge3 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 13
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:144:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  144 |         scanf("%c", &c);
      |         ~~~~~^~~~~~~~~~

ソースコード

diff #
raw source code 

#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using pii = pair<int, int>;
template <class T>
using V = vector<T>;
template <class T>
using VV = V<V<T>>;

#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fi first
#define se second
#define rep(i, n) rep2(i, 0, n)
#define rep2(i, m, n) for (int i = m; i < (n); i++)
#define per(i, b) per2(i, 0, b)
#define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--)
#define ALL(c) (c).begin(), (c).end()
#define SZ(x) ((int)(x).size())

constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }

template <class T, class U>
void chmin(T& t, const U& u) {
    if (t > u) t = u;
}
template <class T, class U>
void chmax(T& t, const U& u) {
    if (t < u) t = u;
}

template <class T, class U>
ostream& operator<<(ostream& os, const pair<T, U>& p) {
    os << "(" << p.first << "," << p.second << ")";
    return os;
}

template <class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
    os << "{";
    rep(i, v.size()) {
        if (i) os << ",";
        os << v[i];
    }
    os << "}";
    return os;
}

#ifdef LOCAL
void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << " " << H;
    debug_out(T...);
}
#define debug(...) \
    cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif

template <unsigned int MOD>
struct ModInt {
    using uint = unsigned int;
    using ull = unsigned long long;
    using M = ModInt;

    uint v;

    ModInt(ll _v = 0) { set_norm(_v % MOD + MOD); }
    M& set_norm(uint _v) {  //[0, MOD * 2)->[0, MOD)
        v = (_v < MOD) ? _v : _v - MOD;
        return *this;
    }

    explicit operator bool() const { return v != 0; }
    M operator+(const M& a) const { return M().set_norm(v + a.v); }
    M operator-(const M& a) const { return M().set_norm(v + MOD - a.v); }
    M operator*(const M& a) const { return M().set_norm(ull(v) * a.v % MOD); }
    M operator/(const M& a) const { return *this * a.inv(); }
    M& operator+=(const M& a) { return *this = *this + a; }
    M& operator-=(const M& a) { return *this = *this - a; }
    M& operator*=(const M& a) { return *this = *this * a; }
    M& operator/=(const M& a) { return *this = *this / a; }
    M operator-() const { return M() - *this; }
    M& operator++(int) { return *this = *this + 1; }
    M& operator--(int) { return *this = *this - 1; }

    M pow(ll n) const {
        if (n < 0) return inv().pow(-n);
        M x = *this, res = 1;
        while (n) {
            if (n & 1) res *= x;
            x *= x;
            n >>= 1;
        }
        return res;
    }

    M inv() const {
        ll a = v, b = MOD, p = 1, q = 0, t;
        while (b != 0) {
            t = a / b;
            swap(a -= t * b, b);
            swap(p -= t * q, q);
        }
        return M(p);
    }

    bool operator==(const M& a) const { return v == a.v; }
    bool operator!=(const M& a) const { return v != a.v; }
    friend ostream& operator<<(ostream& os, const M& a) { return os << a.v; }
    static uint get_mod() { return MOD; }
};

using Mint = ModInt<1000000007>;

const V<Mint> fac = {
    1,         682498929, 491101308, 76479948,  723816384, 67347853,  27368307,
    625544428, 199888908, 888050723, 927880474, 281863274, 661224977, 623534362,
    970055531, 261384175, 195888993, 66404266,  547665832, 109838563, 933245637,
    724691727, 368925948, 268838846, 136026497, 112390913, 135498044, 217544623,
    419363534, 500780548, 668123525, 128487469, 30977140,  522049725, 309058615,
    386027524, 189239124, 148528617, 940567523, 917084264, 429277690, 996164327,
    358655417, 568392357, 780072518, 462639908, 275105629, 909210595, 99199382,
    703397904, 733333339, 97830135,  608823837, 256141983, 141827977, 696628828,
    637939935, 811575797, 848924691, 131772368, 724464507, 272814771, 326159309,
    456152084, 903466878, 92255682,  769795511, 373745190, 606241871, 825871994,
    957939114, 435887178, 852304035, 663307737, 375297772, 217598709, 624148346,
    671734977, 624500515, 748510389, 203191898, 423951674, 629786193, 672850561,
    814362881, 823845496, 116667533, 256473217, 627655552, 245795606, 586445753,
    172114298, 193781724, 778983779, 83868974,  315103615, 965785236, 492741665,
    377329025, 847549272, 698611116};

int main() {
    ll x = 0;
    rep(i, 18) {
        char c;
        scanf("%c", &c);
        if (c == '\n') break;
        x = x * 10 + (c - '0');
    }
    Mint ans;
    if (x > TEN(9) + 7) {
        cout << 0 << endl;
    } else {
        int d = (x - 1) / TEN(7) * TEN(7);
        ans = fac[d / TEN(7)];
        for (int i = d + 1; i < x; ++i) {
            ans *= i;
        }
        if (x % 2 == 0) ans = -ans;
        cout << ans << endl;
    }

    return 0;
}
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