QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#650386 | #8339. Rooted Tree | zxg2333# | AC ✓ | 1184ms | 42992kb | C++17 | 570b | 2024-10-18 14:55:31 | 2024-10-18 14:55:38 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int P=1e9+9,M=1e7+1;
int ksm(int a,int b){
int res=1;
while(b){
if(b&1)res=res*1ll*a%P;
b>>=1;
a=a*1ll*a%P;
}
return res;
}
int ni(int a){
return ksm(a,P-2);
}
int m,k,cnt[M],ans;
int main(){
scanf("%d%d",&m,&k);
cnt[0]=1;
for(int i=1;i<=k;i++)cnt[i]=cnt[i-1]+m-1;
int sd=0;
for(int i=1;i<=k;i++){
ans=(ans+(sd+1)*1ll*m)%P;
sd=(sd*1ll*(cnt[i-1]-1)+(sd+1)*1ll*m)%P*1ll*ni(cnt[i])%P;
}
printf("%d\n",ans);
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3928kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3808kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 74ms
memory: 6840kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 792ms
memory: 30476kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 3752kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 867ms
memory: 33896kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 486ms
memory: 20832kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1175ms
memory: 42688kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 216ms
memory: 12800kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 638ms
memory: 26896kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 379ms
memory: 17160kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 344ms
memory: 16372kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 1022ms
memory: 39260kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1183ms
memory: 42992kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1184ms
memory: 42932kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1184ms
memory: 42880kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed