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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#534164#8339. Rooted Treetraining_233#AC ✓1127ms237940kbC++14897b2024-08-26 21:29:022024-08-26 21:29:03

Judging History

This is the latest submission verdict.

  • [2024-08-26 21:29:03]
  • Judged
  • Verdict: AC
  • Time: 1127ms
  • Memory: 237940kb
  • [2024-08-26 21:29:02]
  • Submitted

answer

#include<bits/stdc++.h>
#define For(i,a,b) for(int i=(a),i##END=(b);i<=i##END;i++)
#define Rof(i,b,a) for(int i=(b),i##END=(a);i>=i##END;i--)
#define go(u) for(int i=head[u];i;i=nxt[i])
#define int long long
using namespace std;
inline int read(){
	int x=0,f=1;
	char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=(x<<1)+(x<<3)+(ch^48);ch=getchar();}
	return x*f;
}
const int N=1e7+10,p=1e9+9;
inline int inv(int a,int b=p-2){
	int x=1;while(b){
		if(b&1)(x*=a)%=p;
		(a*=a)%=p,b>>=1;
	}return x;
}
int m,k;
int E[N],T[N],S[N];
signed main(){
	m=read(),k=read();
	S[0]=1;For(i,1,k)S[i]=S[i-1]+m-1;
	For(i,1,k){
		E[i]=T[i-1]+1;
		T[i]=(T[i-1]*(S[i-1]-1)+m*E[i])%p*inv(S[i])%p;
		// printf("E[%lld] = %lld, T[%lld] = %lld\n",i,E[i],i,T[i]);
	}
	int ans=0;
	For(i,1,k)(ans+=m*E[i])%=p;
	cout<<ans<<endl;
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 5700kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5612kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 72ms
memory: 25184kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 754ms
memory: 160980kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 1ms
memory: 5620kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 813ms
memory: 174716kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 468ms
memory: 101160kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1104ms
memory: 236184kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 204ms
memory: 51256kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 595ms
memory: 133868kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 354ms
memory: 81000kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 320ms
memory: 74448kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 961ms
memory: 205520kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1104ms
memory: 237880kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1104ms
memory: 237880kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1127ms
memory: 237940kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed