QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#791645 | #8339. Rooted Tree | XUAN_# | AC ✓ | 1195ms | 3876kb | C++14 | 664b | 2024-11-28 20:03:38 | 2024-11-28 20:03:43 |
Judging History
answer
#include <cstdio>
#include <iostream>
#include <cstring>
#include <algorithm>
#include <vector>
#define ll long long
#define PB push_back
using namespace std;
const int mod = 1e9 + 9;
int Pow(int x, int y) {
int res = 1;
for(; y; y>>=1, x = 1ll * x * x % mod)
if(y&1) res = 1ll * res * x % mod;
return res;
}
int main() {
int n, m;
cin >> m >> n;
int res = m, sum = 0;
for(int i=1; i<n; ++i) {
sum = (sum + 1ll * m * Pow((1 + 1ll * i * (m-1)) % mod, mod-2))% mod;
// cout << sum << endl;
res = (res + (sum + 1) * 1ll * m) % mod;
}
printf("%d", res);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3848kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3820kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 74ms
memory: 3740kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 803ms
memory: 3756kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3876kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 873ms
memory: 3844kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 491ms
memory: 3824kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1186ms
memory: 3744kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 216ms
memory: 3764kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 648ms
memory: 3700kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 384ms
memory: 3700kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 350ms
memory: 3752kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1030ms
memory: 3832kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1192ms
memory: 3844kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1192ms
memory: 3760kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1195ms
memory: 3696kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed