QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#536768 | #8339. Rooted Tree | ucup-team2179# | AC ✓ | 1092ms | 3716kb | C++20 | 798b | 2024-08-29 16:33:39 | 2024-08-29 16:33:45 |
Judging History
answer
#include <bits/stdc++.h>
#define int long long
using namespace std;
const int M = 1e9 + 9;
int fp(int a,int b){
int re=1;
while(b){
if(b&1)
re = re * a % M;
a = a * a % M;
b = b >> 1;
}
return re;
}
int div(int n){
return fp(n, M - 2);
}
void solve(){
int m, k;
cin >> m >> k;
int pre = 1;
int prev = 1;
int e = 0;
int ev = 0;
for (int i = 1; i <= k;i++){
ev += (e+1) * m%M;
e = ((pre - 1) * e%M + m * (e + 1)%M) * (div(pre + m - 1))%M;
ev %= M;
pre += m - 1;
prev += m;
pre %= M;
prev %= M;
}
cout << ev;
}
signed main(){
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: 0ms
memory: 3648kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3628kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 67ms
memory: 3632kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 732ms
memory: 3568kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 1ms
memory: 3512kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 798ms
memory: 3628kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 448ms
memory: 3688kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1081ms
memory: 3508kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 197ms
memory: 3508kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 591ms
memory: 3716kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 346ms
memory: 3624kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 319ms
memory: 3632kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 939ms
memory: 3552kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1092ms
memory: 3708kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1089ms
memory: 3556kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1085ms
memory: 3688kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed