結果
問題 | No.906 Y字グラフ |
ユーザー | kimiyuki |
提出日時 | 2019-10-11 21:52:32 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 2 ms / 2,000 ms |
コード長 | 4,034 bytes |
コンパイル時間 | 1,729 ms |
コンパイル使用メモリ | 203,508 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-05-04 01:26:39 |
合計ジャッジ時間 | 2,602 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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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
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 1 ms
6,940 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,940 KB |
testcase_06 | AC | 1 ms
6,940 KB |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 1 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | AC | 2 ms
6,940 KB |
testcase_15 | AC | 1 ms
6,944 KB |
testcase_16 | AC | 2 ms
6,940 KB |
testcase_17 | AC | 2 ms
6,940 KB |
testcase_18 | AC | 2 ms
6,944 KB |
testcase_19 | AC | 1 ms
6,940 KB |
testcase_20 | AC | 2 ms
6,944 KB |
testcase_21 | AC | 2 ms
6,940 KB |
testcase_22 | AC | 2 ms
6,944 KB |
testcase_23 | AC | 2 ms
6,940 KB |
testcase_24 | AC | 2 ms
6,940 KB |
testcase_25 | AC | 1 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,940 KB |
testcase_27 | AC | 1 ms
6,940 KB |
testcase_28 | AC | 1 ms
6,944 KB |
testcase_29 | AC | 2 ms
6,940 KB |
testcase_30 | AC | 1 ms
6,944 KB |
testcase_31 | AC | 2 ms
6,940 KB |
ソースコード
#include <bits/stdc++.h> #define REP(i, n) for (int i = 0; (i) < (int)(n); ++ (i)) #define REP3(i, m, n) for (int i = (m); (i) < (int)(n); ++ (i)) #define REP_R(i, n) for (int i = (int)(n) - 1; (i) >= 0; -- (i)) #define REP3R(i, m, n) for (int i = (int)(n) - 1; (i) >= (int)(m); -- (i)) #define ALL(x) std::begin(x), std::end(x) using namespace std; inline constexpr int32_t modpow(uint_fast64_t x, uint64_t k, int32_t MOD) { assert (0 <= x and x < MOD); uint_fast64_t y = 1; for (; k; k >>= 1) { if (k & 1) (y *= x) %= MOD; (x *= x) %= MOD; } assert (0 <= y and y < MOD); return y; } inline int32_t modinv(int32_t value, int32_t MOD) { assert (0 <= value and value < MOD); assert (value != 0); int64_t a = value, b = MOD; int64_t x = 0, y = 1; for (int64_t u = 1, v = 0; a; ) { int64_t q = b / a; x -= q * u; std::swap(x, u); y -= q * v; std::swap(y, v); b -= q * a; std::swap(b, a); } assert (value * x + MOD * y == b and b == 1); if (x < 0) x += MOD; assert (0 <= x and x < MOD); return x; } template <int32_t MOD> struct mint { int32_t value; mint() : value() {} mint(int64_t value_) : value(value_ < 0 ? value_ % MOD + MOD : value_ >= MOD ? value_ % MOD : value_) {} mint(int32_t value_, std::nullptr_t) : value(value_) {} explicit operator bool() const { return value; } inline constexpr mint<MOD> operator + (mint<MOD> other) const { return mint<MOD>(*this) += other; } inline constexpr mint<MOD> operator - (mint<MOD> other) const { return mint<MOD>(*this) -= other; } inline constexpr mint<MOD> operator * (mint<MOD> other) const { return mint<MOD>(*this) *= other; } inline constexpr mint<MOD> & operator += (mint<MOD> other) { this->value += other.value; if (this->value >= MOD) this->value -= MOD; return *this; } inline constexpr mint<MOD> & operator -= (mint<MOD> other) { this->value -= other.value; if (this->value < 0) this->value += MOD; return *this; } inline constexpr mint<MOD> & operator *= (mint<MOD> other) { this->value = (uint_fast64_t)this->value * other.value % MOD; return *this; } inline constexpr mint<MOD> operator - () const { return mint<MOD>(this->value ? MOD - this->value : 0, nullptr); } inline constexpr mint<MOD> pow(uint64_t k) const { return mint<MOD>(modpow(value, k, MOD), nullptr); } inline mint<MOD> inv() const { return mint<MOD>(modinv(value, MOD), nullptr); } inline constexpr mint<MOD> operator / (mint<MOD> other) const { return *this * other.inv(); } inline constexpr mint<MOD> operator /= (mint<MOD> other) { return *this *= other.inv(); } inline constexpr bool operator == (mint<MOD> other) const { return value == other.value; } inline constexpr bool operator != (mint<MOD> other) const { return value != other.value; } }; template <int32_t MOD> mint<MOD> operator * (int64_t value, mint<MOD> n) { return mint<MOD>(value) * n; } template <int32_t MOD> std::istream & operator >> (std::istream & in, mint<MOD> & n) { int64_t value; in >> value; n = value; return in; } template <int32_t MOD> std::ostream & operator << (std::ostream & out, mint<MOD> n) { return out << n.value; } /** * @note O(r) */ template <int32_t MOD> mint<MOD> simple_choose(int64_t n, int32_t r) { assert (0 <= r and r <= n); mint<MOD> num = 1; mint<MOD> den = 1; REP (i, r) { num *= n - i; den *= i + 1; } return num / den; } constexpr int MOD = 1e9 + 7; mint<MOD> solve(int64_t n) { int64_t k = n - 4; mint<MOD> unsorted = simple_choose<MOD>(k + 2, 2); mint<MOD> all_same = (k % 3 == 0 ? 1 : 0); mint<MOD> two_same = mint<MOD>(k / 2 + 1) - all_same; // sorted mint<MOD> distinct = (unsorted - all_same - 3 * two_same) / 6; return all_same + two_same + distinct; } int main() { int64_t n; cin >> n; cout << solve(n) << endl; return 0; }