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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#544867#8339. Rooted Treepengpeng_fudan#AC ✓1060ms3724kbC++23752b2024-09-02 20:42:242024-09-02 20:42:25

Judging History

你现在查看的是最新测评结果

  • [2024-09-02 20:42:25]
  • 评测
  • 测评结果:AC
  • 用时:1060ms
  • 内存:3724kb
  • [2024-09-02 20:42:24]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;

#define endl '\n'
#define maxn 10000005
#define mod 1000000009

int64_t qpow(int64_t a, int64_t x) {
    int64_t ans = 1;
    while (x) {
        if (x & 1) ans = ans * a % mod;
        a = a * a % mod, x >>= 1;
    }
    return ans;
}
int64_t inv(int64_t a) { return qpow(a, mod - 2); }

void solve(void) {
    int m, k;
    cin >> m >> k;
    int64_t ans = 1, f = 1;
    for (int i = 2; i <= k; i++)
        f = (f + m * inv(1 + (i - 1) * (m - 1))) % mod, ans = (ans + f) % mod;
    cout << ans * m % mod << endl;
    return;
}

int main() {
    ios::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);

    int _ = 1;
    while (_--) solve();

    return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3636kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3668kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 65ms
memory: 3664kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 711ms
memory: 3724kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 774ms
memory: 3720kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 435ms
memory: 3592kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1047ms
memory: 3644kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 191ms
memory: 3708kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 574ms
memory: 3632kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 336ms
memory: 3644kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 305ms
memory: 3640kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 903ms
memory: 3592kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1060ms
memory: 3660kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1058ms
memory: 3704kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1058ms
memory: 3672kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed