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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#210841#5749. Directed Vertex CactiHunsterAC ✓139ms4148kbC++143.3kb2023-10-11 20:35:452023-10-11 20:35:45

Judging History

你现在查看的是最新测评结果

  • [2023-10-11 20:35:45]
  • 评测
  • 测评结果:AC
  • 用时:139ms
  • 内存:4148kb
  • [2023-10-11 20:35:45]
  • 提交

answer

#include <bits/stdc++.h>

template <bool flag, typename T1, typename T2>
struct TemplateIf;
template <typename T1, typename T2>
struct TemplateIf<true, T1, T2> { using Type = T1; };
template <typename T1, typename T2>
struct TemplateIf<false, T1, T2> { using Type = T2; };

using i32 = int32_t;
using i64 = int64_t;
using i128 = __int128_t;
using u32 = uint32_t;
using u64 = uint64_t;
using u128 = __uint128_t;
template <typename T>
using Vec = std::vector<T>;
template <typename T, size_t... other>
struct ArraySwitch;
template <typename T, size_t size, size_t... other>
struct ArraySwitch<T, size, other...> { using Result = std::array<typename ArraySwitch<T, other...>::Result, size>; };
template <typename T, size_t size>
struct ArraySwitch<T, size> { using Result = typename std::array<T, size>; };
template <typename T, size_t... size>
using Arr = typename ArraySwitch<T, size...>::Result;
template <typename T>
using MaxHeap = std::priority_queue<T, Vec<T>, std::less<T>>;
template <typename T>
using MinHeap = std::priority_queue<T, Vec<T>, std::greater<T>>;			

constexpr i32 inf32 = (i32)(1e9) + 9;
constexpr i64 inf64 = (i64)(1e18) + 18;

std::mt19937 rng { (std::random_device())() };

template <typename T>
inline T makeVec(T val) { return val; }
template <typename T, typename... Args>
inline auto makeVec(T val, size_t size, Args... rest) {
    auto t = makeVec<T>(val, rest...);
    return Vec<decltype(t)>(size, t);
}

inline i32 clz(u32 x) { return __builtin_clz(x); }
inline i32 clzll(u64 x) { return __builtin_clzll(x); }
inline i32 ctz(u32 x) { return __builtin_ctz(x); }
inline i32 ctzll(u64 x) { return __builtin_ctzll(x); }
inline i32 popcount(u32 x) { return __builtin_popcount(x); }
inline i32 popcountll(u64 x) { return __builtin_popcountll(x); }

template <typename T>
inline T _min(T a) { return a; }
template <typename T, typename... Args>
inline T _min(T a, T b, Args... args) { return _min<T>(std::min<T>(a, b), args...); }
template <typename T>
inline T _max(T a) { return a; }
template <typename T, typename... Args>
inline T _max(T a, T b, Args... args) { return _max<T>(std::max<T>(a, b), args...); }

constexpr i32 num_big_primes = 10;
constexpr Arr<i32, num_big_primes> big_primes { 99990571, 99990337, 99999941, 99999931, 99999847, 99999839, 99999827, 99999821, 99999787, 99999773, };
inline i32 get_big_prime() { return big_primes[std::uniform_int_distribution<i32>(0, num_big_primes - 1)(rng)]; }

constexpr i32 mod = i32(1e9) + 9;

constexpr i32 power(i32 n, i32 m) {
    i32 res = 1;
    while (m) {
        if (m & 1) {
            res = 1ll * res * n % mod;
        }
        n = 1ll * n * n % mod;
        m >>= 1;
    }
    return res;
}
constexpr i32 inv_2 = power(2, mod - 2);

i32 main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    std::cout.tie(nullptr);
    i32 n, m;
    std::cin >> n >> m;
    i32 t = 1ll * (n - 1) * n % mod * inv_2 % mod;
    i32 ans = 1;
    for (i32 i = 1; i <= n; i++) ans = 1ll * ans * i % mod;
    for (i32 i = 1; i <= m; i++) {
        ans = 1ll * ans * t % mod;
        ans = 1ll * ans * power(i, mod - 2) % mod;
        t = (t - 1) % mod;
    }
    ans = (ans + mod) % mod;
    std::cout << ans << std::endl;
    std::cerr << "use time: " << 1. * std::clock() / CLOCKS_PER_SEC << std::endl;
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3840kb

input:

3 1

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 4084kb

input:

4 4

output:

360

result:

ok 1 number(s): "360"

Test #3:

score: 0
Accepted
time: 48ms
memory: 4000kb

input:

39847 348708

output:

983575456

result:

ok 1 number(s): "983575456"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3972kb

input:

1 1

output:

0

result:

ok 1 number(s): "0"

Test #5:

score: 0
Accepted
time: 0ms
memory: 4036kb

input:

3 2

output:

18

result:

ok 1 number(s): "18"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3972kb

input:

3 3

output:

6

result:

ok 1 number(s): "6"

Test #7:

score: 0
Accepted
time: 0ms
memory: 4148kb

input:

3 4

output:

0

result:

ok 1 number(s): "0"

Test #8:

score: 0
Accepted
time: 135ms
memory: 3936kb

input:

3 1000000

output:

0

result:

ok 1 number(s): "0"

Test #9:

score: 0
Accepted
time: 0ms
memory: 4004kb

input:

4 1

output:

144

result:

ok 1 number(s): "144"

Test #10:

score: 0
Accepted
time: 0ms
memory: 3916kb

input:

4 2

output:

360

result:

ok 1 number(s): "360"

Test #11:

score: 0
Accepted
time: 0ms
memory: 3936kb

input:

4 3

output:

480

result:

ok 1 number(s): "480"

Test #12:

score: 0
Accepted
time: 0ms
memory: 3900kb

input:

4 5

output:

144

result:

ok 1 number(s): "144"

Test #13:

score: 0
Accepted
time: 0ms
memory: 4000kb

input:

4 6

output:

24

result:

ok 1 number(s): "24"

Test #14:

score: 0
Accepted
time: 0ms
memory: 3968kb

input:

5 1

output:

1200

result:

ok 1 number(s): "1200"

Test #15:

score: 0
Accepted
time: 0ms
memory: 4136kb

input:

5 2

output:

5400

result:

ok 1 number(s): "5400"

Test #16:

score: 0
Accepted
time: 0ms
memory: 4004kb

input:

5 3

output:

14400

result:

ok 1 number(s): "14400"

Test #17:

score: 0
Accepted
time: 0ms
memory: 3964kb

input:

5 4

output:

25200

result:

ok 1 number(s): "25200"

Test #18:

score: 0
Accepted
time: 0ms
memory: 3960kb

input:

5 5

output:

30240

result:

ok 1 number(s): "30240"

Test #19:

score: 0
Accepted
time: 0ms
memory: 3916kb

input:

5 6

output:

25200

result:

ok 1 number(s): "25200"

Test #20:

score: 0
Accepted
time: 0ms
memory: 3952kb

input:

5 7

output:

14400

result:

ok 1 number(s): "14400"

Test #21:

score: 0
Accepted
time: 0ms
memory: 3960kb

input:

5 8

output:

5400

result:

ok 1 number(s): "5400"

Test #22:

score: 0
Accepted
time: 0ms
memory: 4036kb

input:

5 9

output:

1200

result:

ok 1 number(s): "1200"

Test #23:

score: 0
Accepted
time: 0ms
memory: 4000kb

input:

5 10

output:

120

result:

ok 1 number(s): "120"

Test #24:

score: 0
Accepted
time: 0ms
memory: 4136kb

input:

1000 1

output:

533396879

result:

ok 1 number(s): "533396879"

Test #25:

score: 0
Accepted
time: 0ms
memory: 3968kb

input:

1000 100

output:

199484478

result:

ok 1 number(s): "199484478"

Test #26:

score: 0
Accepted
time: 2ms
memory: 3932kb

input:

1000 10000

output:

656650652

result:

ok 1 number(s): "656650652"

Test #27:

score: 0
Accepted
time: 135ms
memory: 3900kb

input:

1000 1000000

output:

0

result:

ok 1 number(s): "0"

Test #28:

score: 0
Accepted
time: 86ms
memory: 3976kb

input:

535164 619302

output:

721871396

result:

ok 1 number(s): "721871396"

Test #29:

score: 0
Accepted
time: 139ms
memory: 3848kb

input:

1000000 1000000

output:

580712335

result:

ok 1 number(s): "580712335"

Test #30:

score: 0
Accepted
time: 36ms
memory: 3964kb

input:

1000000 234534

output:

546630669

result:

ok 1 number(s): "546630669"

Test #31:

score: 0
Accepted
time: 136ms
memory: 3920kb

input:

234523 1000000

output:

127869098

result:

ok 1 number(s): "127869098"

Test #32:

score: 0
Accepted
time: 2ms
memory: 3844kb

input:

44722 10000

output:

0

result:

ok 1 number(s): "0"