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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
#419000#8339. Rooted TreeyouthpaulAC ✓1388ms3660kbC++20855b2024-05-23 16:54:172024-05-23 16:54:19

Judging History

你现在查看的是最新测评结果

  • [2024-05-23 16:54:19]
  • 评测
  • 测评结果:AC
  • 用时:1388ms
  • 内存:3660kb
  • [2024-05-23 16:54:17]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int P = 1e9+9;
struct mint {
	int x;
	mint(int x = 0) : x(x) {}
//	mint(int x = 0) : x((x%P+P)%P) {}
	mint pow(int b) {
		mint ans = 1, a = *this;
		for (;b;b>>=1,a =a*a) {
			if (b&1) ans = ans*a;
//			cout<< ans.x<< ' '<< a.x<< '\n';
		}
		return ans;
	}
	mint operator*(mint r) { r.x = 1ll * r.x * x % P; return r; }
	mint operator+(mint r) { (r.x+=x) %= P; return r;}
};
int main() {
	cin.tie(0)->sync_with_stdio(0);
//	mint tt; tt.x=2;
//	cout<< tt.pow(P-2).x<< '\n';
	int m, k; cin>> m>> k;
	mint l=0, a=0;

	for (int i = 0; i < k; i++) {
		
		mint inv; inv.x = 1 + (m-1)*i;
		inv = inv.pow(P-2);
		a = a + l * inv;
		l = l * mint((m-1)*i + m) * inv + mint(m);
//		cout<< 1 + (m-1)*i<< ' '<< inv.x<< ' '<< a.x<< ' '<< l.x<< '\n';
		
	}
	cout<< (a + l).x<< '\n';
}

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 3500kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 86ms
memory: 3580kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 932ms
memory: 3600kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 1014ms
memory: 3584kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 570ms
memory: 3528kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1377ms
memory: 3524kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 250ms
memory: 3588kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 748ms
memory: 3588kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 448ms
memory: 3652kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 406ms
memory: 3584kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1196ms
memory: 3604kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1388ms
memory: 3528kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1388ms
memory: 3548kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1388ms
memory: 3600kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed