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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#714245#8339. Rooted TreePalbudir#AC ✓1139ms3720kbC++20980b2024-11-05 22:14:492024-11-05 22:14:49

Judging History

你现在查看的是最新测评结果

  • [2024-11-05 22:14:49]
  • 评测
  • 测评结果:AC
  • 用时:1139ms
  • 内存:3720kb
  • [2024-11-05 22:14:49]
  • 提交

answer

#include <bits/stdc++.h>
using i80 = __int128;
using i64 = long long;
using f80 = long double;
constexpr i64 mod = 1e9 + 9;
i64 pw(i64 x, i64 k) {
    i64 z = 1;
    while (k) {
        if (k & 1) {
            z = z * x % mod;
        }
        x = x * x % mod;
        k >>= 1;
    }
    return z;
}
i64 inv(i64 x) {
    return pw(x, mod - 2);
}
void work() {
    int m, k;
    std::cin >> m >> k;
    i64 cnt = 0, sum = 0, tmp;
    for (int i = 1; i <= k; ++i) {
        tmp = inv(((m - 1) * (i - 1) + 1) % mod);
        sum = (sum + cnt * m % mod * tmp + m) % mod;
        cnt = (cnt * ((m - 1) * i % mod + 1) % mod * tmp % mod + m) % mod;
    }
    std::cout << sum << "\n";

    return;
}
void init() {
}
int main() {
    init();
    std::ios::sync_with_stdio(false);
    // std::cin.tie(nullptr), std::cout.tie(nullptr);
    int t = 1;
    // std::cin >> t;
    while (t--) {

        work();
    }

    return 0;
}
/*


*/

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3648kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 70ms
memory: 3668kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 760ms
memory: 3704kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3624kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 828ms
memory: 3592kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 464ms
memory: 3720kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1125ms
memory: 3644kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 202ms
memory: 3708kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 617ms
memory: 3648kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 366ms
memory: 3588kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 333ms
memory: 3648kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 981ms
memory: 3596kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1139ms
memory: 3648kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1135ms
memory: 3644kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1135ms
memory: 3704kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed