QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#785028 | #8339. Rooted Tree | CodeChild# | AC ✓ | 1141ms | 3696kb | C++20 | 1.5kb | 2024-11-26 16:39:53 | 2024-11-26 16:39:54 |
Judging History
answer
#include <iostream>
#include <cstring>
#include <queue>
#include <map>
#include <cstdio>
#include <unordered_map>
#include <deque>
#include <iomanip>
#include <cmath>
#include <vector>
#include <algorithm>
#include <stack>
#include <set>
#include <array>
#include <bitset>
#include <limits.h>
#include <numeric>
#define x first
#define y second
using namespace std;
typedef long long LL;
typedef long long ll ;
typedef pair<int,int> PII;
typedef pair<int,LL> PIL;
typedef pair<int ,PII> PIII ;
typedef pair<int, pair<PII ,int > > PIIII;
typedef pair<LL , LL> PLL ;
typedef pair<LL ,int > PLI ;
typedef pair<int,char > PIC ;
typedef unsigned long long ULL ;
const int N = 5e5+10,M = 4e5+10 ;
const LL mod = 1e9+9 , INF = 1e18+10;
const int inf = 1e8 ;
const double eps = 1e-7 ;
const ULL P= 131 ;
LL n , m , k ;
LL qmi( LL a , LL b ) {
LL res = 1;
while( b ) {
if( b & 1 ) res = res * a % mod ;
b >>= 1 ;
a = a * a % mod ;
}
return res ;
}
LL inv(LL x ) {
return qmi( x , mod - 2 ) ;
}
void solve( ) {
cin >> m >> k ;
LL ans = 0 , sum = 1 ;
n = 1 ;
for(int i = 1 ; i <= k ; ++ i ) {
LL in = inv(n) ;
ans += m * in % mod * sum % mod ;
ans %= mod ;
sum += ( m - 1 ) * in % mod * sum + m ;
sum %= mod ;
n += m - 1 ;
}
cout << ans << '\n' ;
}
int main(){
ios::sync_with_stdio(false);
cin.tie( 0 ) ; cout.tie(0) ;
int T = 1 ;
// cin >> T ;
while(T-- ){
solve() ;
}
return 0 ;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3636kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3568kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 70ms
memory: 3620kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 767ms
memory: 3568kb
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: 834ms
memory: 3636kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 468ms
memory: 3616kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1132ms
memory: 3640kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 206ms
memory: 3636kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 618ms
memory: 3620kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 367ms
memory: 3620kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 334ms
memory: 3692kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 983ms
memory: 3636kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1141ms
memory: 3616kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1141ms
memory: 3696kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1141ms
memory: 3616kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed