QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#371472 | #8339. Rooted Tree | Satsuki# | TL | 1500ms | 3668kb | C++17 | 812b | 2024-03-30 12:59:12 | 2024-03-30 12:59:14 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'
const int N = 100010, mod = 1e9 + 9;
int a[N];
int qs(int a, int b)
{
int res = 1;
while(b)
{
if(b & 1)res = res * a % mod;
b >>= 1;
a = a * a % mod;
}
return res;
}
void solve()
{
int m,k;cin >> m >> k;
int t = 0;
int now = 1, tmp = 1;
int res = 0;
for(int i = 0;i < k ;i++)
{
res += (t * qs((m - 1) * i + 1, mod - 2) + 1);
t = ((m - 1) * (i + 1) + 1) % mod * qs((m - 1) * (i)%mod + 1, mod - 2) %mod * t % mod + m;
res %= mod;
}
res = (res + mod) % mod;
cout << res * m % mod << endl;
}
signed main()
{
ios::sync_with_stdio(false);cin.tie(0);
solve();
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3560kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 1ms
memory: 3612kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 126ms
memory: 3556kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 1379ms
memory: 3668kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 1500ms
memory: 3608kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 843ms
memory: 3536kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: -100
Time Limit Exceeded
input:
51 9921154