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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#547249#8339. Rooted Treelight_ink_dots#AC ✓1369ms44332kbC++20927b2024-09-04 19:40:032024-09-04 19:40:03

Judging History

你现在查看的是最新测评结果

  • [2024-09-04 19:40:03]
  • 评测
  • 测评结果:AC
  • 用时:1369ms
  • 内存:44332kb
  • [2024-09-04 19:40:03]
  • 提交

answer

//最接近夜的灰褪去的那抹苍蓝 
#include<bits/stdc++.h>
using namespace std;
const int maxm=105,maxn=10000005,mod=1000000009;
int m,n,ans;
int fac[maxn],inv[maxn],nfac[maxn],f[maxn];
inline int C(int a,int b){
	return a<b? 0:1ll*fac[a]*nfac[a-b]%mod*nfac[b]%mod;
}
int ksm(int a,int b){
	int res=1;
	while(b){
		if(b&1)
			res=1ll*res*a%mod;
		a=1ll*a*a%mod,b>>=1;
	}
	return res;
}
int main(){
	scanf("%d%d",&m,&n);
	//cnt[i]=1+i*(m-1)
	/*fac[0]=fac[1]=nfac[0]=nfac[1]=inv[1]=1;
	for(int i=2;i<maxn;i++)
		fac[i]=1ll*fac[i-1]*i%mod,inv[i]=mod-1ll*(mod/i)*inv[mod%i]%mod,nfac[i]=1ll*nfac[i-1]*inv[i]%mod;*/
	f[0]=0;
	for(int i=1;i<=n;i++){
		int iv=ksm(1+(i-1)*(m-1),mod-2);
		f[i]=(f[i-1]+1ll*f[i-1]*(m-1)%mod*iv+m)%mod;
		int val=(1ll*f[i-1]*m%mod*iv+m)%mod;
		ans=(ans+val)%mod;
//		printf("i=%d f[i]=%d\n",i,f[i]);
//		cnt[i]*(-i+(i+1)*m)
	}
	printf("%d\n",ans);
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3884kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3844kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 81ms
memory: 6228kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 922ms
memory: 31412kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3892kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 1004ms
memory: 33828kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 540ms
memory: 20304kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1363ms
memory: 43216kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 248ms
memory: 11568kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 745ms
memory: 25584kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 442ms
memory: 17616kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 378ms
memory: 16856kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1174ms
memory: 39192kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1362ms
memory: 43888kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1357ms
memory: 44332kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1369ms
memory: 44264kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed