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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
#578165#8339. Rooted TreeOkuchiri#AC ✓1256ms3704kbC++20841b2024-09-20 17:06:252024-09-20 17:06:26

Judging History

你现在查看的是最新测评结果

  • [2024-09-20 17:06:26]
  • 评测
  • 测评结果:AC
  • 用时:1256ms
  • 内存:3704kb
  • [2024-09-20 17:06:25]
  • 提交

answer

#include<bits/stdc++.h>
#define ll long long
#define int long long
using namespace std;
const ll mod=1000000009;
ll ksm(ll x,ll y)
{
    ll res=1;
    x=x%mod;
    while(y)
    {
        if(y&1)res=res*x%mod;
        x=x*x%mod;
        y=y/2;
    }
    return res;
}
ll m,k,r;
ll f[101][101];
signed main()
{
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>m>>k;
    ll ans=0,s=0,now=1,res=1;
    for(ll i=1;i<=k;i++)
    {
        ll e=s*ksm(res*now,mod-2)%mod;
        ans=(ans*now%mod+((e+1)*res%mod*(now)%mod)%mod*m%mod)%mod;
        s=(s*(now-1+mod)%mod+((e+1)*res%mod*(now)%mod)%mod*m%mod)%mod;
        //cout<<ans<<' '<<s<<' '<<now<<' '<<res<<'\n';
        res=res*now%mod;
        now=(now+m-1)%mod;
        
    }
    //res=res*ksm(now,mod-2)%mod;
    cout<<ans*ksm(res,mod-2)%mod;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3656kb

input:

6 2

output:

18

result:

ok 1 number(s): "18"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3600kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 78ms
memory: 3576kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 843ms
memory: 3664kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

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

input:

1 111

output:

6216

result:

ok 1 number(s): "6216"

Test #6:

score: 0
Accepted
time: 917ms
memory: 3660kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 515ms
memory: 3596kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1246ms
memory: 3564kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 227ms
memory: 3588kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 680ms
memory: 3648kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 403ms
memory: 3648kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 367ms
memory: 3668kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 1076ms
memory: 3628kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1251ms
memory: 3660kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1256ms
memory: 3704kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1252ms
memory: 3628kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed