QOJ.ac

QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#586752#8339. Rooted TreeRepeater#AC ✓1088ms3708kbC++20657b2024-09-24 15:21:522024-09-24 15:21:54

Judging History

你现在查看的是最新测评结果

  • [2024-09-24 15:21:54]
  • 评测
  • 测评结果:AC
  • 用时:1088ms
  • 内存:3708kb
  • [2024-09-24 15:21:52]
  • 提交

answer

#include<bits/stdc++.h>

using namespace std;

using ll = long long;

const int mod = 1e9 + 9; 

ll power(ll a, ll b){
	ll res = 1;
	while(b){
		if(b & 1)
			res = res * a % mod;
		a = a * a % mod;
		b >>= 1;
	}
	return res;
}

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

	int m, k;
	cin >> m >> k;

	ll ans = 0, cur = 0;
	for(int i = 1; i <= k; i++){
		ans = (ans + cur) % mod;
		ll tmp = ((m - 1) * i + 1) % mod;
		cur = (cur * tmp + m) % mod * power(tmp, mod - 2) % mod;
	}

	ans = (ans + cur * ((m - 1) * k % mod + 1) % mod) % mod;
	// cout << cur << "\n";
	cout << ans << "\n";


	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3568kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 67ms
memory: 3580kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 730ms
memory: 3584kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 794ms
memory: 3584kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 446ms
memory: 3688kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1075ms
memory: 3648kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 196ms
memory: 3624kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 589ms
memory: 3560kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 349ms
memory: 3648kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 318ms
memory: 3672kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 935ms
memory: 3612kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1088ms
memory: 3644kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1088ms
memory: 3708kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1087ms
memory: 3644kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed