QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#347658 | #8339. Rooted Tree | ucup-team2681# | AC ✓ | 1397ms | 3932kb | C++23 | 659b | 2024-03-09 14:44:36 | 2024-03-09 14:44:36 |
Judging History
answer
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int p=1e9+9;
int qpow(int x,int y){
int s=1;
while(y){
if(y&1)s=(ll)s*x%p;
x=(ll)x*x%p;
y>>=1;
}
return s;
}
void solve(){
int sum=0,ans=0,n=1,m,k;
scanf("%d%d",&m,&k);
for(int i=1;i<=k;i++){
int x,y,inv=qpow(n,p-2);
ans=(ans+((ll)sum*inv+1)%p*m)%p;
sum=(sum-(ll)sum*inv%p+((ll)sum*inv+1)%p*m+p)%p;
n+=m-1;
if(n>=p)n-=p;
}
printf("%d\n",ans);
}
int main(){
int t=1;
//scanf("%d",&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: 3708kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3932kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 86ms
memory: 3880kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 938ms
memory: 3900kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3788kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 1024ms
memory: 3848kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 569ms
memory: 3896kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1388ms
memory: 3820kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 252ms
memory: 3920kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 759ms
memory: 3892kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 450ms
memory: 3920kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 408ms
memory: 3788kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1199ms
memory: 3796kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1397ms
memory: 3928kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1393ms
memory: 3888kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1397ms
memory: 3928kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed