結果
問題 | No.1044 正直者大学 |
ユーザー | stoq |
提出日時 | 2020-05-01 22:59:22 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 20 ms / 2,000 ms |
コード長 | 5,963 bytes |
コンパイル時間 | 1,655 ms |
コンパイル使用メモリ | 174,704 KB |
実行使用メモリ | 8,064 KB |
最終ジャッジ日時 | 2024-06-07 11:20:04 |
合計ジャッジ時間 | 2,860 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 10 ms
7,936 KB |
testcase_01 | AC | 10 ms
8,064 KB |
testcase_02 | AC | 10 ms
7,936 KB |
testcase_03 | AC | 9 ms
7,936 KB |
testcase_04 | AC | 10 ms
7,936 KB |
testcase_05 | AC | 10 ms
8,064 KB |
testcase_06 | AC | 20 ms
7,936 KB |
testcase_07 | AC | 10 ms
7,936 KB |
testcase_08 | AC | 10 ms
7,936 KB |
testcase_09 | AC | 10 ms
7,936 KB |
testcase_10 | AC | 10 ms
7,936 KB |
testcase_11 | AC | 10 ms
8,064 KB |
testcase_12 | AC | 10 ms
7,936 KB |
testcase_13 | AC | 16 ms
8,064 KB |
testcase_14 | AC | 10 ms
7,936 KB |
testcase_15 | AC | 10 ms
7,936 KB |
testcase_16 | AC | 16 ms
7,808 KB |
testcase_17 | AC | 14 ms
7,936 KB |
testcase_18 | AC | 15 ms
7,936 KB |
testcase_19 | AC | 11 ms
7,936 KB |
testcase_20 | AC | 11 ms
7,936 KB |
testcase_21 | AC | 11 ms
7,936 KB |
testcase_22 | AC | 10 ms
7,936 KB |
testcase_23 | AC | 10 ms
8,064 KB |
testcase_24 | AC | 10 ms
8,064 KB |
testcase_25 | AC | 9 ms
7,936 KB |
testcase_26 | AC | 10 ms
7,936 KB |
testcase_27 | AC | 10 ms
7,936 KB |
testcase_28 | AC | 10 ms
7,936 KB |
testcase_29 | AC | 10 ms
8,064 KB |
ソースコード
#define MOD_TYPE 1 #pragma region Macros #include <bits/stdc++.h> using namespace std; /* #include <boost/multiprecision/cpp_int.hpp> #include <boost/multiprecision/cpp_dec_float.hpp> using multiInt = boost::multiprecision::cpp_int; using lld = boost::multiprecision::cpp_dec_float_100; */ /* #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") */ using ll = long long int; using ld = long double; using pii = pair<int, int>; using pll = pair<ll, ll>; using pld = pair<ld, ld>; template <typename Q_type> using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>; constexpr ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353); constexpr int INF = (int)1e9; constexpr ll LINF = (ll)4e18; constexpr ld PI = acos(-1.0); constexpr ld EPS = 1e-11; constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0}; constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0}; #define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i) #define rep(i, n) REP(i, 0, n) #define REPI(i, m, n) for (int i = m; i < (int)(n); ++i) #define repi(i, n) REPI(i, 0, n) #define MP make_pair #define MT make_tuple #define YES(n) cout << ((n) ? "YES" : "NO") << "\n" #define Yes(n) cout << ((n) ? "Yes" : "No") << "\n" #define possible(n) cout << ((n) ? "possible" : "impossible") << "\n" #define Possible(n) cout << ((n) ? "Possible" : "Impossible") << "\n" #define Yay(n) cout << ((n) ? "Yay!" : ":(") << "\n" #define all(v) v.begin(), v.end() #define NP(v) next_permutation(all(v)) #define dbg(x) cerr << #x << ":" << x << "\n"; inline void init_main() { cin.tie(0); ios::sync_with_stdio(false); cout << setprecision(30) << setiosflags(ios::fixed); } template <typename T> inline bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; } template <typename T> inline bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; } inline ll CEIL(ll a, ll b) { return (a + b - 1) / b; } template <typename A, size_t N, typename T> inline void Fill(A (&array)[N], const T &val) { fill((T *)array, (T *)(array + N), val); } #pragma endregion template <int MOD> struct Fp { long long val; constexpr Fp(long long v = 0) noexcept : val(v % MOD) { if (val < 0) v += MOD; } constexpr int getmod() { return MOD; } constexpr Fp operator-() const noexcept { return val ? MOD - val : 0; } constexpr Fp operator+(const Fp &r) const noexcept { return Fp(*this) += r; } constexpr Fp operator-(const Fp &r) const noexcept { return Fp(*this) -= r; } constexpr Fp operator*(const Fp &r) const noexcept { return Fp(*this) *= r; } constexpr Fp operator/(const Fp &r) const noexcept { return Fp(*this) /= r; } constexpr Fp &operator+=(const Fp &r) noexcept { val += r.val; if (val >= MOD) val -= MOD; return *this; } constexpr Fp &operator-=(const Fp &r) noexcept { val -= r.val; if (val < 0) val += MOD; return *this; } constexpr Fp &operator*=(const Fp &r) noexcept { val = val * r.val % MOD; if (val < 0) val += MOD; return *this; } constexpr Fp &operator/=(const Fp &r) noexcept { long long a = r.val, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } val = val * u % MOD; if (val < 0) val += MOD; return *this; } constexpr bool operator==(const Fp &r) const noexcept { return this->val == r.val; } constexpr bool operator!=(const Fp &r) const noexcept { return this->val != r.val; } friend constexpr ostream &operator<<(ostream &os, const Fp<MOD> &x) noexcept { return os << x.val; } friend constexpr istream &operator>>(istream &is, Fp<MOD> &x) noexcept { return is >> x.val; } }; Fp<MOD> modpow(const Fp<MOD> &a, long long n) noexcept { if (n == 0) return 1; auto t = modpow(a, n / 2); t = t * t; if (n & 1) t = t * a; return t; } using mint = Fp<MOD>; template <class T> struct BiCoef { vector<T> fact_, inv_, finv_; constexpr BiCoef() { } constexpr BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1) { init(n); } constexpr void init(int n) noexcept { fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1); int MOD = fact_[0].getmod(); for (int i = 2; i < n; i++) { fact_[i] = fact_[i - 1] * i; inv_[i] = -inv_[MOD % i] * (MOD / i); finv_[i] = finv_[i - 1] * inv_[i]; } } constexpr T C(ll n, ll k) const noexcept { if (n < k || n < 0 || k < 0) return 0; return fact_[n] * finv_[k] * finv_[n - k]; } constexpr T P(ll n, ll k) const noexcept { return C(n, k) * fact_[k]; } constexpr T H(ll n, ll k) const noexcept { return C(n + k - 1, k); } constexpr T Ch1(ll n, ll k) const noexcept { if (n < 0 || k < 0) return 0; T res = 0; for (int i = 0; i < n; i++) res += C(n, i) * modpow(n - i, k) * (i & 1 ? -1 : 1); return res; } constexpr T fact(ll n) const noexcept { if (n < 0) return 0; return fact_[n]; } constexpr T inv(ll n) const noexcept { if (n < 0) return 0; return inv_[n]; } constexpr T finv(ll n) const noexcept { if (n < 0) return 0; return finv_[n]; } }; BiCoef<mint> bc(200010); int main() { init_main(); ll n, m, k; cin >> n >> m >> k; mint ans = 0; for (int t = 1; t < 200010; t++) { if (n - t + m - t >= k) ans += bc.H(t, n - t) * bc.H(t, m - t) * bc.fact(n) * bc.fact(m) * 2; if (n - (t + 1) + m - t + 1 >= k) ans += bc.H(t + 1, n - (t + 1)) * bc.H(t, m - t) * bc.fact(n) * bc.fact(m); if (n - t + m - (t + 1) + 1 >= k) ans += bc.H(t, n - t) * bc.H(t + 1, m - (t + 1)) * bc.fact(n) * bc.fact(m); } ans /= (n + m); cout << ans << "\n"; return 0; }