QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#649814 | #8339. Rooted Tree | Martian148 | AC ✓ | 81ms | 3728kb | C++23 | 778b | 2024-10-18 10:42:11 | 2024-10-18 10:42:11 |
Judging History
answer
#include <bits/stdc++.h>
using ll = long long;
constexpr ll TT = 1e9 + 9;
constexpr int N = 105;
ll qpow(ll a, ll b) {
ll res = 1;
while (b) {
if (b & 1) res = res * a % TT;
a = a * a % TT;
b >>= 1;
}
return res;
}
int main() {
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr); std::cout.tie(nullptr);
ll M, K; std::cin >> M >> K;
ll a = 0, b = 0, cnt = 1, dq_fm = 1;
for (int i = 1; i <= K; i++) {
b = (b + a * M + M * dq_fm) % TT;
a = (a * cnt + a * (M - 1) + M * dq_fm) % TT;
b = b * (cnt + M - 1) % TT;
dq_fm = dq_fm * (cnt + M - 1) % TT;
cnt = cnt + M - 1;
}
std::cout << b * qpow(dq_fm, TT - 2) % TT << '\n';
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3588kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3592kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 6ms
memory: 3676kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 55ms
memory: 3676kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3728kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 60ms
memory: 3680kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 34ms
memory: 3600kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 81ms
memory: 3676kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 15ms
memory: 3592kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 44ms
memory: 3600kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 23ms
memory: 3592kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 21ms
memory: 3660kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 70ms
memory: 3592kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 81ms
memory: 3672kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 81ms
memory: 3676kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 81ms
memory: 3596kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed