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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#348071#8339. Rooted Treeucup-team3215#AC ✓1182ms3740kbC++20606b2024-03-09 16:49:092024-03-09 16:49:10

Judging History

你现在查看的是最新测评结果

  • [2024-03-09 16:49:10]
  • 评测
  • 测评结果:AC
  • 用时:1182ms
  • 内存:3740kb
  • [2024-03-09 16:49:09]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

constexpr int mod = 1e9 + 9;

auto& mul(auto&& a, auto b) { return a = a * (uint64_t)b % mod; }
auto& add(auto&& a, auto b) { return a = (a + b) % mod; }
int fpow(int a, int b) { for (int r = 1; ; b /= 2, mul(a, a)) if (!b) return r; else if (b % 2) mul(r, a); }

int main() {
  cin.tie(0)->sync_with_stdio(0);
  int m, n; cin >> m >> n;
  int l = 0, s = 0;
  for (int i = 0; i < n; ++i) {
    int t = fpow((m - 1) * i + 1, mod - 2);
    add(s, mul(+m, 1 + mul(+l, t)));
    add(mul(l, 1 + mul(m - 1, t)), m);
  }
  cout << s << '\n';
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 3736kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 73ms
memory: 3604kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 794ms
memory: 3608kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 863ms
memory: 3652kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 485ms
memory: 3668kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1174ms
memory: 3672kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 214ms
memory: 3728kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 641ms
memory: 3604kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 380ms
memory: 3688kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 345ms
memory: 3640kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1018ms
memory: 3608kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1179ms
memory: 3728kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1182ms
memory: 3668kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1178ms
memory: 3740kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed