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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
#604221	#8339. Rooted Tree	tarjen	AC ✓	1143ms	3680kb	C++20	870b	2024-10-02 01:58:18	2024-10-02 01:58:18

Judging History

你现在查看的是最新测评结果

[2024-10-02 01:58:18]
评测

测评结果：AC
用时：1143ms
内存：3680kb

查看

[2024-10-02 01:58:18]
提交

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long 
const int mod=1e9+9;
int ksm(int x,int k){
    int res=1;
    while(k){
        if(k&1)res=res*x%mod;
        x=x*x%mod;
        k/=2;
    }
    return res;
}
int ny(int x){
    return ksm(x,mod-2);
}
void add(int &x,int y){
    if((x+=y)>=mod)x-=mod;
}
void del(int &x,int y){
    if((x-=y)<0)x+=mod;
}
signed main()
{
    int n,m;cin>>n>>m;
    int all=0,tot=0,leaf=0,leafcnt=1;
    for(int i=1;i<=m;i++){
        int now=leaf+1;
        int l=leaf;
        add(all,now*n%mod);
        leaf=leaf*leafcnt%mod;
        del(leaf,l);
        add(leaf,n*now%mod);
        add(tot,n);
        add(leafcnt,n-1);
        leaf=leaf*ny(leafcnt)%mod;
        // cout<<"i="<<i<<" now="<<now<<" leaf="<<leaf<<" all="<<all<<" leafcnt="<<leafcnt<<"\n";
    }
    cout<<all;
}

源文件, 语言: C++20

详细

Test #1:

score: 100

Accepted

time: 0ms

memory: 3680kb

input:

6 2

output:

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: 71ms

memory: 3532kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0

Accepted

time: 763ms

memory: 3532kb

input:

48 6713156

output:

198541581

result:

ok 1 number(s): "198541581"

Test #5:

score: 0

Accepted

time: 0ms

memory: 3528kb

input:

1 111

output:

result:

ok 1 number(s): "6216"

Test #6:

score: 0

Accepted

time: 835ms

memory: 3588kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0

Accepted

time: 469ms

memory: 3632kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0

Accepted

time: 1134ms

memory: 3608kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0

Accepted

time: 206ms

memory: 3588kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0

Accepted

time: 620ms

memory: 3676kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0

Accepted

time: 367ms

memory: 3588kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0

Accepted

time: 335ms

memory: 3496kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0

Accepted

time: 984ms

memory: 3528kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0

Accepted

time: 1139ms

memory: 3492kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0

Accepted

time: 1143ms

memory: 3616kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0

Accepted

time: 1143ms

memory: 3560kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0

Extra Test Passed