QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#536048 | #8339. Rooted Tree | Albert711 | AC ✓ | 1110ms | 3700kb | C++14 | 749b | 2024-08-28 18:00:17 | 2024-08-28 18:00:17 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod=1e9+9;
const int N=1e5+5;
int fp(int base,int pow){
int r=1;
while(pow){
if(pow&1) r=r*base%mod;
base=base*base%mod;
pow>>=1;
}
return r;
}
void solve(){
int m,k;
cin>>m>>k;
int ans=0;
int cnt=1;
int ex=0;
for(int i=1;i<=k;i++){
ans+=ex;
ex=((cnt-1)*ex%mod+m*(ex+1)%mod)%mod*fp(cnt-1+m,mod-2)%mod;
cnt=((cnt-1+m)%mod+mod)%mod;
}
ans=(ans+cnt*ex%mod)%mod;
cout<<ans<<'\n';
}
signed main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);cout.tie(nullptr);
int T=1;
// cin>>T;
while(T--) solve();
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3544kb
input:
6 2
output:
18
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: 68ms
memory: 3620kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 745ms
memory: 3620kb
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: 810ms
memory: 3608kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 455ms
memory: 3556kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1100ms
memory: 3552kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 200ms
memory: 3572kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 601ms
memory: 3576kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 356ms
memory: 3620kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 316ms
memory: 3700kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 952ms
memory: 3644kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1110ms
memory: 3572kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1109ms
memory: 3588kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1105ms
memory: 3684kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed