QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#371473 | #8339. Rooted Tree | Satsuki# | AC ✓ | 1091ms | 3680kb | C++17 | 829b | 2024-03-30 13:01:38 | 2024-03-30 13:01:38 |
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;
int las = 0;
for(int i = 0;i < k ;i++)
{
int las = qs((m - 1) * (i)%mod + 1, mod - 2);
res += (t * las + 1);
t = ((m - 1) * (i + 1) + 1) % mod * las %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
Tip: Click on the bar to expand more detailed information
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: 3616kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 68ms
memory: 3620kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 731ms
memory: 3544kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 1ms
memory: 3568kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 797ms
memory: 3672kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 448ms
memory: 3564kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1082ms
memory: 3600kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 193ms
memory: 3680kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 591ms
memory: 3604kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 350ms
memory: 3604kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 319ms
memory: 3652kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 938ms
memory: 3596kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1085ms
memory: 3608kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1091ms
memory: 3580kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1090ms
memory: 3556kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed