QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#634056 | #8339. Rooted Tree | _fcy_# | AC ✓ | 1115ms | 238096kb | C++14 | 1.2kb | 2024-10-12 16:38:28 | 2024-10-12 16:38:33 |
Judging History
answer
#include<bits/stdc++.h>
#define fi first
#define se second
#define int long long
using namespace std;
template <typename T> void qmin(T &x,T y) { x=min(x,y); }
template <typename T> void qmax(T &x,T y) { x=max(x,y); }
typedef pair<int,int> pii;
const int mod=1e9+9;
const int maxn=1e7+10;
int inf=1e18;
int de=0;
int n,m,k;
int leafsum[maxn],leaf[maxn],sum[maxn];
int qpow(int x,int y)
{
int ans=1,base=x;
while(y)
{
if(y&1)
{
ans*=base;
ans%=mod;
}
base*=base;
base%=mod;
y>>=1;
}
return ans;
}
int ny(int x)
{
return qpow(x,mod-2);
}
int add(int x,int y){
x+=y; x%=mod;
return x;
}
int del(int x,int y){
x-=y; x%=mod; x+=mod; x%=mod;
return x;
}
int mul(int x,int y){
x*=y; x%=mod;
return x;
}
void solve(){
cin>>m>>k;
for(int i=1;i<=k;i++){
leafsum[i]=add(del(leafsum[i-1],leaf[i-1]),mul(m,leaf[i-1]+1));
leaf[i]=mul(leafsum[i],ny(1+(m-1)*i));
sum[i]=add(sum[i-1],mul(leaf[i-1]+1,m));
}
cout<<sum[k]<<"\n";
}
signed main(){
ios::sync_with_stdio(0); cin.tie(0);
int TT;
TT=1;
//cin>>TT;
while(TT--){
solve();
}
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3596kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 69ms
memory: 23084kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 754ms
memory: 162392kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 814ms
memory: 177200kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 460ms
memory: 102920kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1102ms
memory: 236180kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 194ms
memory: 49844kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 612ms
memory: 132132kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 357ms
memory: 82264kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 320ms
memory: 76168kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 976ms
memory: 209448kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1109ms
memory: 237968kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1115ms
memory: 238096kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1095ms
memory: 238040kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed