QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #686744 | #8339. Rooted Tree | ucup-team1412 | AC ✓ | 1188ms | 159936kb | C++14 | 785b | 2024-10-29 15:28:59 | 2024-10-29 15:28:59 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int P=1000000009;
ll a[10000005];
ll xx[10000005];
ll quickpow(ll x, ll y) {
ll ans = 1;
while (y) {
if (y & 1) ans *= x;
ans %= P;
y >>= 1;
x *= x;
x %= P;
}
return ans % P;
}
int main() {
ll m,k;
cin>>m>>k;
a[0]=0;
ll ans=1;
for(int i=0;i<=k;i++){
xx[i]=quickpow(((m-1)*i+1),P-2);
}
for(int i=1;i<k;i++){
ll x1=quickpow(((m-1)*(i-1)+1),P-2);
ll x2=quickpow(((m-1)*i+1),P-2);
a[i]=((((a[i-1]*((m-1)*i+1))%P)*xx[i-1])%P+m)%P;
ans=(ans+1+(a[i]*xx[i])%P)%P;
}
ans=ans*m%P;
cout<<ans;
return 0;
}
/*
2
6
2 1 2 2 1 1
4
1 2 1 1
*/
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 5596kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 5684kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 75ms
memory: 16932kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 779ms
memory: 111516kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 5552kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 869ms
memory: 121936kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 492ms
memory: 68988kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1155ms
memory: 159256kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 218ms
memory: 34660kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 645ms
memory: 89868kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 371ms
memory: 57108kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 344ms
memory: 51984kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1002ms
memory: 141472kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1168ms
memory: 159756kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1164ms
memory: 159936kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1188ms
memory: 159752kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed