QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#649814#8339. Rooted TreeMartian148AC ✓81ms3728kbC++23778b2024-10-18 10:42:112024-10-18 10:42:11

Judging History

你现在查看的是最新测评结果

  • [2024-10-18 10:42:11]
  • 评测
  • 测评结果:AC
  • 用时:81ms
  • 内存:3728kb
  • [2024-10-18 10:42:11]
  • 提交

answer

#include <bits/stdc++.h>

using ll = long long;
constexpr ll TT = 1e9 + 9;
constexpr int N = 105;

ll qpow(ll a, ll b) {
    ll res = 1;
    while (b) {
        if (b & 1) res = res * a % TT;
        a = a * a % TT;
        b >>= 1;
    }
    return res;
}

int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(nullptr); std::cout.tie(nullptr);
    ll M, K; std::cin >> M >> K;
    ll a = 0, b = 0, cnt = 1, dq_fm = 1;
    for (int i = 1; i <= K; i++) {
        b = (b + a * M + M * dq_fm) % TT;
        a = (a * cnt + a * (M - 1) + M * dq_fm) % TT;
        b = b * (cnt + M - 1) % TT;
        dq_fm = dq_fm * (cnt + M - 1) % TT;
        cnt = cnt + M - 1;
    }
    std::cout << b * qpow(dq_fm, TT - 2) % TT << '\n';
    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3588kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3592kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 6ms
memory: 3676kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 55ms
memory: 3676kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3728kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 60ms
memory: 3680kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 34ms
memory: 3600kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 81ms
memory: 3676kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 15ms
memory: 3592kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 44ms
memory: 3600kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 23ms
memory: 3592kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 21ms
memory: 3660kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 70ms
memory: 3592kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 81ms
memory: 3672kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 81ms
memory: 3676kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 81ms
memory: 3596kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed