QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#685413 | #8339. Rooted Tree | ucup-team1412 | AC ✓ | 1177ms | 159944kb | C++23 | 864b | 2024-10-28 19:19:38 | 2024-10-28 19:19:38 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
const ll maxn = 1e7 + 10;
const ll maxm = 1e7 + 10;
const ll inf = 0x3f3f3f3f;
const ll P = 1e9 + 9;
ll quickpow(ll x, ll y) {
ll ans = 1;
while (y) {
if (y & 1) ans *= x;
ans %= P;
y >>= 1;
x *= x;
x %= P;
}
return ans % P;
}
ll A[maxn], B[maxn];
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
ll m, k;
cin >> m >> k;
A[0] = 0;
B[0] = 0;
// cout << quickpow(3, 5);
for (ll i = 1; i <= k; i++) {
ll ni = quickpow((m - 1) * (i - 1) + 1, P - 2);
A[i] = (A[i - 1] * ((m - 1) * ni % P + 1) % P + m % P) % P;
B[i] = (B[i - 1] + A[i - 1] * ni % P) % P;
}
cout << (A[k] + B[k]) % P;
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 5616kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 5624kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 71ms
memory: 15140kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 789ms
memory: 110176kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 1ms
memory: 5660kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 865ms
memory: 120204kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 487ms
memory: 68876kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1173ms
memory: 159252kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 210ms
memory: 32544kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 622ms
memory: 89604kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 376ms
memory: 57448kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 337ms
memory: 51596kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1011ms
memory: 141612kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1170ms
memory: 159888kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1175ms
memory: 159860kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1177ms
memory: 159944kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed