QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #623496 | #8339. Rooted Tree | Diverbee# | AC ✓ | 1063ms | 3708kb | C++14 | 551b | 2024-10-09 12:24:59 | 2024-10-09 12:24:59 |
Judging History
answer
#include "bits/stdc++.h"
using namespace std;
const int mod = 1e9+9;
using ll = long long;
ll qpow(ll a,ll b){
ll res = 1;
while (b){
if (b&1) res = res*a%mod;
a = a*a%mod;
b>>=1;
}
return res;
}
int main(){
ios::sync_with_stdio(false);
cin.tie(0);cout.tie(0);
int m,k;cin>>m>>k;
ll ans = 0;
for(int i = 1 ; i<= k ;++i){
ans = (ans + (k-i)*1ll*qpow(i*m-i+1,mod-2)%mod)%mod;
}
ans = ans*m%mod*m%mod;
ans = (ans + m*k %mod)%mod;
cout<<ans;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3656kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3708kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 66ms
memory: 3700kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 713ms
memory: 3580kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 776ms
memory: 3704kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 436ms
memory: 3592kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1053ms
memory: 3584kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 192ms
memory: 3572kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 572ms
memory: 3576kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 341ms
memory: 3660kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 310ms
memory: 3652kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 915ms
memory: 3580kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1063ms
memory: 3636kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1062ms
memory: 3708kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1062ms
memory: 3580kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed