QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #721753 | #8339. Rooted Tree | Nyanya_# | AC ✓ | 1160ms | 3688kb | C++20 | 623b | 2024-11-07 16:45:39 | 2024-11-07 16:45:40 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int MOD = 1e9 + 9;
int main() {
int m, k;
cin >> m >> k;
long long ans = 0, siz = 1, sum = 0;
auto Pow = [&](long long x, long long y) -> long long {
long long ans = 1;
while (y) {
if (y & 1)
ans = ans * x % MOD;
x = x * x % MOD;
y >>= 1;
}
return ans;
};
for (int i = 1; i <= k; ++i) {
long long inv = Pow(siz, MOD - 2);
ans = (ans + m * sum % MOD * inv % MOD + m) % MOD;
sum = (m + sum + sum * inv % MOD * (m - 1) % MOD) % MOD;
siz = (siz + m - 1) % MOD;
}
cout << ans;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3532kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3608kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 72ms
memory: 3688kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 775ms
memory: 3624kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3540kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 844ms
memory: 3612kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 473ms
memory: 3616kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1151ms
memory: 3604kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 209ms
memory: 3616kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 629ms
memory: 3668kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 373ms
memory: 3532kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 339ms
memory: 3488kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1000ms
memory: 3536kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1160ms
memory: 3532kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1160ms
memory: 3600kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1160ms
memory: 3540kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed