QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#516569 | #8339. Rooted Tree | lsflsf2023 | AC ✓ | 1151ms | 159864kb | C++14 | 1.0kb | 2024-08-12 18:56:20 | 2024-08-12 18:56:23 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
using LL = long long;
using PII = pair<LL , int> ;
using ULL = unsigned long long;
const int N = 1e7 + 10,Mod = 1e9 + 9;
LL a[N] , b[N];
LL qmi(LL a , LL b){
LL res = 1;
while(b){
if(b & 1) res = res * a % Mod;
a = a * a % Mod;
b >>= 1;
}
return res;
}
void solved() {
LL m , k;
cin >> m >> k;
LL ans = 0;
for(int i = 1 ; i <= k ; i ++ ){
LL inv = qmi((m - 1) * (i - 1) + 1 , Mod - 2);
LL res = ((m - 1) * i + 1) % Mod * inv % Mod;
a[i] = (res * a[i - 1]) % Mod;
a[i] = (a[i] + m) % Mod;
res = a[i - 1] * inv % Mod;
b[i] = (b[i - 1] + res) % Mod;
ans = (ans + b[i]) % Mod;
}
cout << (b[k] + a[k]) % Mod << "\n";
}
int main(){
// freopen("D:\\dev\\code\\sunwking\\1.in" , "r" , stdin);
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t = 1;
// cin >> t;
while(t -- )
solved();
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3632kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3644kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 73ms
memory: 13804kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 764ms
memory: 112120kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 833ms
memory: 120768kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 464ms
memory: 70116kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1134ms
memory: 158636kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 207ms
memory: 33864kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 617ms
memory: 90272kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 371ms
memory: 55668kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 330ms
memory: 51300kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 978ms
memory: 141628kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1151ms
memory: 159804kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1139ms
memory: 159804kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1151ms
memory: 159864kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed