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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#692674#8339. Rooted TreeLegend_dy#AC ✓1155ms3716kbC++20821b2024-10-31 14:53:542024-10-31 14:54:11

Judging History

你现在查看的是最新测评结果

  • [2024-10-31 14:54:11]
  • 评测
  • 测评结果:AC
  • 用时:1155ms
  • 内存:3716kb
  • [2024-10-31 14:53:54]
  • 提交

answer

#include<bits/stdc++.h>

using namespace std;

#define int long long

constexpr int P = 1e9 + 9;

int ksm(int x, int k) {
    int res = 1;
    while (k) {
        if (k & 1) res = res * x % P;
        x = x * x % P;
        k >>= 1;
    }
    return res;
}

void solve() {
    int m, k;
    cin >> m >> k;

    int x = 0, ans = 0, cnt = 1;
    for (int i = 1; i <= k; i++) {
        ans = (ans + (x + 1) * m % P) % P;
        int y = x;
        x = x * (cnt - 1) % P;
        x = (x + m * (y + 1) % P) % P;
        cnt = (cnt + m - 1) % P;
        x = x * ksm(cnt, P - 2) % P;
    }

    cout << ans << "\n";
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int T = 1;
    // cin >> T;

    while (T--) {
        solve();
    }

    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3656kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3656kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 71ms
memory: 3660kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 772ms
memory: 3580kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3704kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 844ms
memory: 3640kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 473ms
memory: 3584kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1146ms
memory: 3580kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 209ms
memory: 3716kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 627ms
memory: 3584kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 371ms
memory: 3704kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 337ms
memory: 3580kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 995ms
memory: 3656kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1151ms
memory: 3588kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1151ms
memory: 3708kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1155ms
memory: 3628kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed