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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#347892#8339. Rooted Treeucup-team2432#AC ✓1112ms3668kbC++20749b2024-03-09 16:07:472024-03-09 16:07:47

Judging History

你现在查看的是最新测评结果

  • [2024-03-09 16:07:47]
  • 评测
  • 测评结果:AC
  • 用时:1112ms
  • 内存:3668kb
  • [2024-03-09 16:07:47]
  • 提交

answer

#include "bits/stdc++.h"

#define all(x)   x.begin(), x.end()
#define NL       std::cout << '\n'

using lnt = long long;

const int inf = 0x3f3f3f3f;
const lnt linf = 1ll << 62;

int main() {
  std::ios::sync_with_stdio(0), std::cin.tie(0);
  const int mo = 1e9 + 9;
  auto inv = [&](lnt x) {
    int e = mo - 2;
    lnt ret = 1;
    while (e) {
      if (e & 1) { ret = ret * x % mo; }
      e >>= 1; x = x * x % mo;
    }
    return ret;
  };
  int m, Q; std::cin >> m >> Q;
  lnt contri = 0;
  lnt dep = 1;
  lnt k = 1;
  while (Q--) {
    contri = (contri + dep * m % mo) % mo;
    dep = ((k-1) * dep + (dep+1) * m % mo) % mo * inv(k+m-1) % mo;
    k = k + (m-1);
  }
  std::cout << contri;



  return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3584kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 69ms
memory: 3592kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 746ms
memory: 3552kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3524kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 812ms
memory: 3604kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 456ms
memory: 3584kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1101ms
memory: 3528kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 201ms
memory: 3532kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 602ms
memory: 3524kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 357ms
memory: 3600kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 325ms
memory: 3668kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 958ms
memory: 3596kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1111ms
memory: 3608kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1112ms
memory: 3612kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1111ms
memory: 3604kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed