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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#588833#8339. Rooted TreeRepeaterAC ✓1106ms3724kbC++20595b2024-09-25 14:47:562024-09-25 14:47:56

Judging History

你现在查看的是最新测评结果

  • [2024-09-25 14:47:56]
  • 评测
  • 测评结果:AC
  • 用时:1106ms
  • 内存:3724kb
  • [2024-09-25 14:47:56]
  • 提交

answer

#include <bits/stdc++.h>

using i64 = long long;

constexpr int P = 1e9 + 9;

i64 power(i64 a, i64 b)
{
	i64 res = 1;
	for( ; b; b >>= 1, a = a * a % P)
		if(b & 1) res = res * a % P;

	return res;
}

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

	int m, k; std::cin >> m >> k;

	i64 ans = 0, f = 0;
	for(int i = 1; i <= k; i++)
	{
		i64 inv = power(1LL * (i - 1) * (m - 1) + 1, P - 2);
		ans = (ans + f * inv % P + 1) % P;
		f = (f * (1LL * i * (m - 1) + 1) % P * inv % P + m) % P;
	}

	std::cout << ans * m % P << "\n";

	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3592kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 68ms
memory: 3656kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 743ms
memory: 3636kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 808ms
memory: 3660kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 454ms
memory: 3652kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1089ms
memory: 3588kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 200ms
memory: 3584kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 599ms
memory: 3576kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 360ms
memory: 3656kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 315ms
memory: 3724kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 953ms
memory: 3600kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1106ms
memory: 3648kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1106ms
memory: 3672kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1106ms
memory: 3716kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed