QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #701645 | #8339. Rooted Tree | Rykony | AC ✓ | 1151ms | 3732kb | C++20 | 506b | 2024-11-02 14:28:32 | 2024-11-02 14:28:33 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using LL=long long;
const LL mod=1e9+9;
LL qpow(LL a,LL n)
{
LL ans=1;
while (n){
if (n&1) ans=ans*a%mod;
a=a*a%mod;
n>>=1;
}
return ans;
}
int main()
{
LL m,k;
cin>>m>>k;
LL sum=1,p=0;
LL ans=0;
LL pre=1;
for (int i=1;i<=k;i++){
ans+=m*(p*sum%mod+sum)%mod*pre%mod;
ans%=mod;
pre=qpow((sum-1+m+mod)%mod,mod-2);
p=(p*sum%mod+m+p*(m-1)%mod)%mod*pre%mod;
sum=(sum-1+m+mod)%mod;
}
cout<<ans<<'\n';
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3652kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3584kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 67ms
memory: 3576kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 771ms
memory: 3732kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 838ms
memory: 3592kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 471ms
memory: 3568kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1136ms
memory: 3660kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 203ms
memory: 3576kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 618ms
memory: 3680kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 369ms
memory: 3656kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 336ms
memory: 3668kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 992ms
memory: 3652kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1144ms
memory: 3680kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1151ms
memory: 3652kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1148ms
memory: 3512kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed