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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#793733#8339. Rooted TreeMaxduanAC ✓1171ms3704kbC++20928b2024-11-29 23:36:122024-11-29 23:36:17

Judging History

你现在查看的是最新测评结果

  • [2024-11-29 23:36:17]
  • 评测
  • 测评结果:AC
  • 用时:1171ms
  • 内存:3704kb
  • [2024-11-29 23:36:12]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define maxn 10000005
#define ll long long
const int p=1e9+9;
int lstl,lstans,lstcnt;

int qpow(int a,int b){
    int ans=1,tmp=a;
    while(b){
        if(b&1){
            ans=1LL*ans*tmp%p;
        }
        tmp=1LL*tmp*tmp%p;
        b>>=1;
    }
    return ans;
}

void solve(){
    int m,k;cin>>m>>k;
    lstl=0,lstans=0,lstcnt=1;
    
    for(int i=1;i<=k;i++){
        int a1=0,a2=0;
        a1=(1LL*(lstl+1)*m+1LL*(lstcnt-1)*lstl)%p*qpow(lstcnt+m-1,p-2)%p;
        a2=((lstans+1LL*(lstl+1)*m))%p;
        lstcnt=lstcnt+m-1;
        if(lstcnt>=p)lstcnt-=p;
        lstl=a1,lstans=a2;
        //cout<<"i="<<i<<' '<<lstl<<' '<<lstans<<' '<<lstcnt<<'\n';
        
    }
    cout<<lstans;
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int TT=1;//cin>>TT;
    while(TT--){
        solve();
    }
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 3700kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

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

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 72ms
memory: 3616kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 785ms
memory: 3636kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 854ms
memory: 3652kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 480ms
memory: 3640kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1156ms
memory: 3568kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 211ms
memory: 3628kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 630ms
memory: 3564kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 376ms
memory: 3640kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 342ms
memory: 3640kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1008ms
memory: 3652kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1171ms
memory: 3636kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1162ms
memory: 3576kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1170ms
memory: 3648kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed