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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#726424 | #8339. Rooted Tree | beamishboys# | AC ✓ | 1101ms | 3700kb | C++23 | 654b | 2024-11-09 00:16:16 | 2024-11-09 00:16:17 |
Judging History
answer
#include <iostream>
#include <vector>
using namespace std;
using ll = long long;
const ll mod = 1e9+9;
ll modPow(ll n, ll p) {
ll b = n, o = 1;
while (p) {
if (p&1) o = (b*o)%mod;
p/=2;
b = (b*b)%mod;
}
return o;
}
ll inv(ll n) {
return modPow(n, mod-2);
}
int main() {
ll m, k; cin >> m >> k;
ll dleaf = 0, dnode = 0;
ll leafCnt = 1;
ll nodeCnt = 0;
for (ll i = 0; i < k; i++) {
ll aleaf = (dleaf * inv(leafCnt))%mod;
dnode = dnode + aleaf;
dnode %= mod;
dleaf = dleaf + m*(aleaf+1) - aleaf + mod;
dleaf %= mod;
leafCnt += m-1;
nodeCnt++;
}
cout << (dleaf + dnode)%mod << endl;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3616kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3688kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 68ms
memory: 3700kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 739ms
memory: 3680kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3676kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 801ms
memory: 3560kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 452ms
memory: 3676kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1092ms
memory: 3672kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 199ms
memory: 3620kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 597ms
memory: 3628kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 354ms
memory: 3616kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 322ms
memory: 3660kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 944ms
memory: 3620kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1101ms
memory: 3632kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1100ms
memory: 3616kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1101ms
memory: 3632kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed