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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#714296#8339. Rooted TreelolteAC ✓1117ms159960kbC++20748b2024-11-05 22:28:322024-11-05 22:28:34

Judging History

你现在查看的是最新测评结果

  • [2024-11-05 22:28:34]
  • 评测
  • 测评结果:AC
  • 用时:1117ms
  • 内存:159960kb
  • [2024-11-05 22:28:32]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
int m,k;
const int mod = 1e9+9 , maxn = 1e7+10;
int kasumi(int x,int y) {
	int ans=1,base=x;
	while (y) {
		if (y&1) ans=(ans*base)%mod;
		base=(base*base)%mod;
		y>>=1;
	}
	return ans;
}
int inv(int x) {
	return kasumi(x%mod,mod-2);
} 
int sum[maxn],qwq[maxn];
signed main(){
    ios::sync_with_stdio(false);
    //std::cin.tie(nullptr);std::cout.tie(nullptr);
    cin>>m>>k;
    sum[0]=0;
    for (int i=1;i<=k;++i) {
    	qwq[i]=inv((m-1)*(i-1)+1);
    	sum[i]=(sum[i-1]*(((m-1)*i+1)%mod)%mod*qwq[i]+m)%mod;
	}
	int ans=0;
	for (int i=1;i<=k;++i) {
		ans=(ans+(((((sum[i-1]*qwq[i])+1)%mod)*m)%mod))%mod;
	}
	cout<<ans%mod<<"\n";
	return 0;
}


Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 1ms
memory: 5640kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 1ms
memory: 5700kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 71ms
memory: 16136kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 747ms
memory: 109840kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 5632kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 814ms
memory: 120816kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 465ms
memory: 71804kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1097ms
memory: 159288kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 199ms
memory: 35468kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 607ms
memory: 89556kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 360ms
memory: 57024kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 318ms
memory: 52308kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 961ms
memory: 141332kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1117ms
memory: 159908kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1105ms
memory: 159960kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1114ms
memory: 159900kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed