QOJ.ac
QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#578517 | #8339. Rooted Tree | red# | AC ✓ | 1135ms | 3704kb | C++20 | 629b | 2024-09-20 19:43:48 | 2024-09-20 19:43:49 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod=1e9+9;
int fast(int x,int k)
{
int ret=1;
while(k)
{
if(k&1) ret=ret*x%mod;
x=x*x%mod;
k>>=1;
}
return ret;
}
void solve()
{
int m,k;
cin>>m>>k;
int ret=0;
int ans=0;
for(int i=1;i<=k;++i)
{
int tmp=ret*((m-1)*(i-1)%mod)%mod+(ret+1)*m%mod;
ans+=(ret+1)*m%mod;
tmp=tmp%mod;
tmp=tmp*fast((m-1)*i%mod+1,mod-2)%mod;
ret=tmp%mod;
ans%=mod;
}
cout<<ans%mod<<'\n';
}
signed main()
{
ios::sync_with_stdio(0);
cin.tie(0);
int T=1;
//cin>>T;
while(T--) solve();
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3640kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3556kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 70ms
memory: 3608kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 762ms
memory: 3628kb
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: 829ms
memory: 3704kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 465ms
memory: 3628kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1126ms
memory: 3572kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 201ms
memory: 3552kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 615ms
memory: 3608kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 364ms
memory: 3612kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 332ms
memory: 3700kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 977ms
memory: 3636kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1134ms
memory: 3552kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1135ms
memory: 3608kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1134ms
memory: 3624kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed