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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#350886#8339. Rooted TreeLynkcat#AC ✓1117ms3680kbC++201011b2024-03-11 09:11:092024-03-11 09:11:09

Judging History

你现在查看的是最新测评结果

  • [2024-03-11 09:11:09]
  • 评测
  • 测评结果:AC
  • 用时:1117ms
  • 内存:3680kb
  • [2024-03-11 09:11:09]
  • 提交

answer

#include<bits/stdc++.h>
#define poly vector<int>
#define IOS ios::sync_with_stdio(false)
#define ll long long
#define mp make_pair
#define mt make_tuple
#define pa pair < int,int >
#define fi first
#define se second
#define inf 1e18
#define mod 1000000009
#define sz(x) ((int)((x).size()))
#define int ll
// #define N 
using namespace std;
int n,m;
inline ll quickPower(ll x,ll y)
{
    ll res=1;
    while (y)
    {
        if (y&1) res=res*x%mod;
        x=x*x%mod;
        y>>=1;
    }
    return res;
}
void BellaKira()
{
    cin>>n>>m;
    int a=0,x=1,b=0;
    for (int i=1;i<=m;i++)
    {
        int coef=1*quickPower(x,mod-2)%mod;
        a=(a+(b*n%mod)%mod*coef%mod+n)%mod;
        b=(b+b*(n-1)%mod*coef%mod+n)%mod;
        x+=n-1;
    }
    cout<<a<<'\n';
}
signed main()
{
    IOS;
    cin.tie(0);
    int T=1;
    while (T--)
    {
        BellaKira();
    }
}
/*list:
1.mod 998244353 or 1e9+7 or ???
2.N
3.duipai shuju xingtai duoyidian
...
*/

Details

Tip: Click on the bar to expand more detailed information

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: 3676kb

input:

2 6

output:

600000038

result:

ok 1 number(s): "600000038"

Test #3:

score: 0
Accepted
time: 69ms
memory: 3656kb

input:

83 613210

output:

424200026

result:

ok 1 number(s): "424200026"

Test #4:

score: 0
Accepted
time: 749ms
memory: 3616kb

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: 816ms
memory: 3648kb

input:

28 7304152

output:

457266679

result:

ok 1 number(s): "457266679"

Test #7:

score: 0
Accepted
time: 458ms
memory: 3680kb

input:

38 4101162

output:

232117382

result:

ok 1 number(s): "232117382"

Test #8:

score: 0
Accepted
time: 1106ms
memory: 3608kb

input:

51 9921154

output:

340670552

result:

ok 1 number(s): "340670552"

Test #9:

score: 0
Accepted
time: 201ms
memory: 3564kb

input:

79 1801157

output:

620550406

result:

ok 1 number(s): "620550406"

Test #10:

score: 0
Accepted
time: 604ms
memory: 3616kb

input:

22 5417157

output:

457449071

result:

ok 1 number(s): "457449071"

Test #11:

score: 0
Accepted
time: 359ms
memory: 3652kb

input:

25 3210162

output:

36368303

result:

ok 1 number(s): "36368303"

Test #12:

score: 0
Accepted
time: 326ms
memory: 3552kb

input:

67 2919160

output:

935195555

result:

ok 1 number(s): "935195555"

Test #13:

score: 0
Accepted
time: 961ms
memory: 3656kb

input:

77 8613163

output:

482832472

result:

ok 1 number(s): "482832472"

Test #14:

score: 0
Accepted
time: 1115ms
memory: 3624kb

input:

90 10000000

output:

275581651

result:

ok 1 number(s): "275581651"

Test #15:

score: 0
Accepted
time: 1117ms
memory: 3608kb

input:

99 9999999

output:

126087169

result:

ok 1 number(s): "126087169"

Test #16:

score: 0
Accepted
time: 1115ms
memory: 3564kb

input:

100 10000000

output:

451590067

result:

ok 1 number(s): "451590067"

Extra Test:

score: 0
Extra Test Passed