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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#536048#8339. Rooted TreeAlbert711AC ✓1110ms3700kbC++14749b2024-08-28 18:00:172024-08-28 18:00:17

Judging History

你现在查看的是最新测评结果

  • [2024-08-28 18:00:17]
  • 评测
  • 测评结果:AC
  • 用时:1110ms
  • 内存:3700kb
  • [2024-08-28 18:00:17]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod=1e9+9;
const int N=1e5+5;
int fp(int base,int pow){
    int r=1;
    while(pow){
        if(pow&1) r=r*base%mod;
        base=base*base%mod;
        pow>>=1;
    }
    return r;
}

void solve(){
    int m,k;
    cin>>m>>k;
    int ans=0;
    int cnt=1;
    int ex=0;
    for(int i=1;i<=k;i++){
        ans+=ex;
        ex=((cnt-1)*ex%mod+m*(ex+1)%mod)%mod*fp(cnt-1+m,mod-2)%mod;
        cnt=((cnt-1+m)%mod+mod)%mod;
    }
    ans=(ans+cnt*ex%mod)%mod;
    cout<<ans<<'\n';
}

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

詳細信息

Test #1:

score: 100
Accepted
time: 0ms
memory: 3544kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3680kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 68ms
memory: 3620kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 745ms
memory: 3620kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3556kb

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 810ms
memory: 3608kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 455ms
memory: 3556kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1100ms
memory: 3552kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 200ms
memory: 3572kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 601ms
memory: 3576kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 356ms
memory: 3620kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 316ms
memory: 3700kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 952ms
memory: 3644kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1110ms
memory: 3572kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1109ms
memory: 3588kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1105ms
memory: 3684kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed