QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#375535 | #8339. Rooted Tree | Leonard# | AC ✓ | 1080ms | 81356kb | C++17 | 979b | 2024-04-03 12:03:32 | 2024-04-03 12:03:33 |
Judging History
answer
#include <bits/stdc++.h>
using ll = long long;
using lb = long double;
const int mod = 1e9 + 9;
ll ksm(ll a, ll b) {
ll ans = 1;
while(b) {
if(b & 1) ans = ans * a % mod;
b = b >> 1;
a = a * a % mod;
}
return ans;
}
void solve() {
ll m, k; std::cin >> m >> k;
std::vector<ll> f(k + 1);
ll num = 1, ans = 0;
for(ll i = 1; i <= k; i++) {
ans = (ans + f[i - 1]) % mod;
num = (num - 1 + m) % mod;
f[i] = (f[i - 1] * num % mod + m) % mod * ksm(num, mod - 2) % mod;
// f[i] = (f[i - 1] * num + m) * 1.0 / num;
// std::cout << i << ' ' << f[i] << ' ' << num << '\n';
}
ans = ((ans + f[k] * num % mod) % mod + mod) % mod;
std::cout << ans << '\n';
}
int main() {
std::ios::sync_with_stdio(0);
std::cin.tie(0);
std::cout.tie(0);
int t = 1;
// std::cin >> t;
while(t--) {
solve();
}
return 0 - 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3612kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3520kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 64ms
memory: 8044kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 723ms
memory: 55512kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3512kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 786ms
memory: 60220kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 449ms
memory: 35208kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1067ms
memory: 80572kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 198ms
memory: 17184kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 587ms
memory: 45468kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 343ms
memory: 28168kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 315ms
memory: 25996kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 927ms
memory: 70460kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1080ms
memory: 81308kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1076ms
memory: 81356kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1080ms
memory: 81268kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed