QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#706475 | #8339. Rooted Tree | Anneliese# | AC ✓ | 1130ms | 161712kb | C++14 | 1.0kb | 2024-11-03 11:37:25 | 2024-11-03 11:37:27 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using LL = long long;
using ll = long long;
const int N = 10000005;
#define rep(i,a ,b ) for(int i = a ;i<=b;i++)
#define pre(i,a ,b ) for(int i = a ;i>=b;i--)
#define pb push_back
#define sc(x) scanf("%d",&x)
ll dp[N];
ll f[N];
ll dp2[N];
const int mod=1e9+9;
ll ksm(ll a,ll b){ll res=1;
while(b){
if(b%2==1)res=res*a%mod;a=a*a%mod;b/=2;
}
return res;
}
ll ny[N];
void solve() {
int m,k;
sc(m);sc(k);
f[0]=1;
rep(i,1,k)f[i]=(f[i-1]+m-1)%mod;
/*rep(i,2,k){
ny[i]=(mod-mod/i)*ny[mod%i]%mod;
}*/
ll res=0;
rep(i,1,k){
ll tmp=ksm(f[i-1],mod-2);
dp[i]=dp[i-1]+(dp[i-1]*(m-1)%mod+f[i-1]*m%mod)*tmp%mod;//dp[i]为叶子节点深度之和
dp[i]%=mod;
res=(res+(dp[i-1]*m%mod+f[i-1]*m%mod)*tmp)%mod;
// cout<<dp[i-1]*m%mod+f[i-1]*m%mod*ksm(f[i-1],mod-2)%mod<<" "<<endl;
}
cout<<res<<endl;
}
int main() {
ios::sync_with_stdio(false);
cin.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: 1ms
memory: 5868kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 5812kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 64ms
memory: 15412kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 804ms
memory: 112028kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 1ms
memory: 5888kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 832ms
memory: 121660kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 464ms
memory: 72380kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1130ms
memory: 161400kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 206ms
memory: 34408kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 605ms
memory: 92448kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 365ms
memory: 56620kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 331ms
memory: 52452kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 987ms
memory: 141168kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1122ms
memory: 160392kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1129ms
memory: 161712kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1127ms
memory: 160776kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed