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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#576348#8339. Rooted TreeUESTC_EndlessEmbrace#AC ✓1136ms3712kbC++20707b2024-09-19 20:01:232024-09-19 20:01:23

Judging History

你现在查看的是最新测评结果

  • [2024-09-19 20:01:23]
  • 评测
  • 测评结果:AC
  • 用时:1136ms
  • 内存:3712kb
  • [2024-09-19 20:01:23]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
typedef pair<int,int> PII;
typedef long long LL ;
#define int LL
#define x first
#define y second
const int N = 1e3+10,mod = 1e9+9;
int qmi(int a,int k)
{
	int res= 1;
	while(k)
	{
		if(k&1) res=res*a%mod;
		a=a*a%mod;
		k>>=1;
	}
	return res;
}
int m,k;
void solve()
{
	cin>>m>>k;
	int ans = 0;
	int x= 0;
	int last = 1;
	for(int i= 1;i<=k;i++)
	{
		int cur = last + m-1;
		ans = (ans + m*(x+1)%mod)%mod;
		x=(x*(last-1)%mod +m*(x+1)%mod)%mod*qmi(cur,mod-2)%mod;
		last =cur;
	}
	cout<<ans<<"\n";
}
signed main()
{
	ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	int T = 1;
	//cin>>T;
	while(T--)
	{
		solve();
	}
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3704kb

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: 70ms
memory: 3616kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 763ms
memory: 3560kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 830ms
memory: 3704kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 466ms
memory: 3620kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1127ms
memory: 3644kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 205ms
memory: 3712kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 616ms
memory: 3708kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 365ms
memory: 3612kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 332ms
memory: 3636kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 979ms
memory: 3708kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1133ms
memory: 3616kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1136ms
memory: 3648kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1132ms
memory: 3576kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed