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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
#797945#8339. Rooted TreeWarma_Cute#AC ✓220ms159936kbC++14786b2024-12-03 21:35:182024-12-03 21:35:24

Judging History

你现在查看的是最新测评结果

  • [2024-12-03 21:35:24]
  • 评测
  • 测评结果:AC
  • 用时:220ms
  • 内存:159936kb
  • [2024-12-03 21:35:18]
  • 提交

answer

// 
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define N 10000007
#define mid ((L+R)/2)
const int inf=1e18+7,p=1e9+9;
int v1,v2,m,k;
int fac[N],inv[N],sm=1;
int qpow(int x,int y) {
	int r=1,b=x;
	while(y) {
		if(y&1) r=r*b%p;
		b=b*b%p,y/=2;
	} return r;
}
signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0),cout.tie(0);
	cin>>m>>k,fac[0]=1;
	for(int i=1;i<=k;i++) fac[i]=fac[i-1]*(1+(m-1)*(i-1))%p;
	inv[k]=qpow(fac[k],p-2);
	for(int i=k-1;i>=1;i--) inv[i]=inv[i+1]*(1+(m-1)*(i))%p;
	// m=1?
	for(int i=1;i<=k;i++) {
		int kv=inv[i]*fac[i-1]%p;
		v1=v1+(m*v2%p*kv%p+m);
		v2=v2+((m-1)*v2%p*kv%p+m);
		v1%=p,v2%=p;
	}
	cout<<v1;
    return 0;
}
/*
0     m-1     m     0     0     0     0     0     0 
0     
*/

详细

Test #1:

score: 100
Accepted
time: 1ms
memory: 5736kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5744kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 16ms
memory: 15664kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 141ms
memory: 110060kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 1ms
memory: 5720kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 154ms
memory: 120660kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 89ms
memory: 72076kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 218ms
memory: 159364kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 38ms
memory: 34420kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 121ms
memory: 92304kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 67ms
memory: 56960kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 60ms
memory: 52988kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 183ms
memory: 141608kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 220ms
memory: 159936kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 207ms
memory: 159916kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 212ms
memory: 159844kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed