QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#576348 | #8339. Rooted Tree | UESTC_EndlessEmbrace# | AC ✓ | 1136ms | 3712kb | C++20 | 707b | 2024-09-19 20:01:23 | 2024-09-19 20:01:23 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef pair<int,int> PII;
typedef long long LL ;
#define int LL
#define x first
#define y second
const int N = 1e3+10,mod = 1e9+9;
int qmi(int a,int k)
{
int res= 1;
while(k)
{
if(k&1) res=res*a%mod;
a=a*a%mod;
k>>=1;
}
return res;
}
int m,k;
void solve()
{
cin>>m>>k;
int ans = 0;
int x= 0;
int last = 1;
for(int i= 1;i<=k;i++)
{
int cur = last + m-1;
ans = (ans + m*(x+1)%mod)%mod;
x=(x*(last-1)%mod +m*(x+1)%mod)%mod*qmi(cur,mod-2)%mod;
last =cur;
}
cout<<ans<<"\n";
}
signed main()
{
ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
int T = 1;
//cin>>T;
while(T--)
{
solve();
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3704kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3648kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 70ms
memory: 3616kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 763ms
memory: 3560kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3580kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 830ms
memory: 3704kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 466ms
memory: 3620kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1127ms
memory: 3644kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 205ms
memory: 3712kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 616ms
memory: 3708kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 365ms
memory: 3612kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 332ms
memory: 3636kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 979ms
memory: 3708kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1133ms
memory: 3616kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1136ms
memory: 3648kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1132ms
memory: 3576kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed