QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#639509 | #8339. Rooted Tree | Blamek# | AC ✓ | 1166ms | 3720kb | C++17 | 810b | 2024-10-13 20:05:25 | 2024-10-13 20:05:25 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod = 1e9 + 9;
int qmi(int a, int b = mod - 2) {
int ans=1;
for(;b!=0;b/=2){
if(b&1) ans=ans*a%mod;
a=a*a%mod;
}
return ans;
}
void solve() {
int m, k;
cin >> m >> k;
int ans = 0, res = 0, sum = 1;
for (int i = 1; i <= k; i++) {
int z = (res * qmi(sum) % mod + 1) % mod;
ans = (ans + z * m % mod) % mod;
sum = sum + m - 1;
res -= z - 1;
res += z * m;
res = (res % mod + mod) % mod;
// cout<<ans<<" "<<res<<" "<<sum<<"\n";
}
cout << ans << "\n";
}
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t = 1;
// cin >> t;
while (t--) solve();
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3652kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 72ms
memory: 3592kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 783ms
memory: 3648kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3588kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 852ms
memory: 3584kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 479ms
memory: 3596kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1153ms
memory: 3648kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 210ms
memory: 3640kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 632ms
memory: 3648kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 371ms
memory: 3720kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 341ms
memory: 3668kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1004ms
memory: 3652kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1162ms
memory: 3652kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1166ms
memory: 3584kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1166ms
memory: 3612kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed