QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#462648 | #8339. Rooted Tree | castc | AC ✓ | 1090ms | 164736kb | C++20 | 776b | 2024-07-03 23:06:17 | 2024-07-03 23:06:17 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=5e7+10,M=1e9+9;
int ny[N],dp[N],zt[N],maxx,f[N];
int ksm(int a, int n, int p) {
int ans = 1;
while(n) {
if(n & 1) {
ans = ans * a % p;
}
a = a * a % p;
n >>= 1;
}
return ans;
}
signed main(){
int m,k;
cin>>m>>k;
f[0]=1;
for(int i=1;i<=k;i++){
f[i]=f[i-1]-1+m;
}
dp[0]=0;
ny[1]=1;
for(int i=1;i<=k;i++){
int zqx=ksm(f[i],M-2,M);
dp[i] = (dp[i - 1] * (f[i - 1] - 1 + m) % M + m) * zqx;
dp[i]%=M;
}
int ans1=dp[k]*f[k]%M;
for(int i=1;i<k;i++){
ans1+=dp[i];
ans1%=M;
}
cout<<ans1<<endl;
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 7768kb
input:
6 2
output:
18
result:
ok 1 number(s): "18"
Test #2:
score: 0
Accepted
time: 0ms
memory: 7748kb
input:
2 6
output:
600000038
result:
ok 1 number(s): "600000038"
Test #3:
score: 0
Accepted
time: 61ms
memory: 18348kb
input:
83 613210
output:
424200026
result:
ok 1 number(s): "424200026"
Test #4:
score: 0
Accepted
time: 716ms
memory: 113908kb
input:
48 6713156
output:
198541581
result:
ok 1 number(s): "198541581"
Test #5:
score: 0
Accepted
time: 0ms
memory: 7744kb
input:
1 111
output:
6216
result:
ok 1 number(s): "6216"
Test #6:
score: 0
Accepted
time: 785ms
memory: 121000kb
input:
28 7304152
output:
457266679
result:
ok 1 number(s): "457266679"
Test #7:
score: 0
Accepted
time: 447ms
memory: 72812kb
input:
38 4101162
output:
232117382
result:
ok 1 number(s): "232117382"
Test #8:
score: 0
Accepted
time: 1073ms
memory: 164116kb
input:
51 9921154
output:
340670552
result:
ok 1 number(s): "340670552"
Test #9:
score: 0
Accepted
time: 197ms
memory: 37668kb
input:
79 1801157
output:
620550406
result:
ok 1 number(s): "620550406"
Test #10:
score: 0
Accepted
time: 592ms
memory: 92152kb
input:
22 5417157
output:
457449071
result:
ok 1 number(s): "457449071"
Test #11:
score: 0
Accepted
time: 345ms
memory: 59164kb
input:
25 3210162
output:
36368303
result:
ok 1 number(s): "36368303"
Test #12:
score: 0
Accepted
time: 323ms
memory: 54240kb
input:
67 2919160
output:
935195555
result:
ok 1 number(s): "935195555"
Test #13:
score: 0
Accepted
time: 931ms
memory: 143600kb
input:
77 8613163
output:
482832472
result:
ok 1 number(s): "482832472"
Test #14:
score: 0
Accepted
time: 1090ms
memory: 164648kb
input:
90 10000000
output:
275581651
result:
ok 1 number(s): "275581651"
Test #15:
score: 0
Accepted
time: 1082ms
memory: 164736kb
input:
99 9999999
output:
126087169
result:
ok 1 number(s): "126087169"
Test #16:
score: 0
Accepted
time: 1085ms
memory: 162612kb
input:
100 10000000
output:
451590067
result:
ok 1 number(s): "451590067"
Extra Test:
score: 0
Extra Test Passed