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ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#397963 | #8047. DFS Order 4 | grass8cow | AC ✓ | 463ms | 6432kb | C++17 | 577b | 2024-04-24 20:43:45 | 2024-04-24 20:43:46 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
int n,f[810][810],inv[810],mod;
int main(){
scanf("%d%d",&n,&mod);
f[1][0]=1;inv[1]=1;
for(int i=2;i<=n;i++)inv[i]=mod-1ll*inv[mod%i]*(mod/i)%mod;
for(int i=2;i<=n;i++){
for(int j=0;i+j<=n;j++){
f[i][j]=f[i-1][0];
//只有一个子树
for(int k=2;k+1<i;k++)
(f[i][j]+=1ll*f[i-k][j]*(f[k][0]-f[k][i-1-k+j])%mod)%=mod;
//k:第一个子树的大小
f[i][j]=1ll*f[i][j]*inv[i+j-1]%mod;
}
}
int ans=f[n][0];
for(int i=1;i<n;i++)ans=1ll*ans*i%mod;
return printf("%d",(ans+mod)%mod),0;
}
这程序好像有点Bug,我给组数据试试?
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 1ms
memory: 3904kb
input:
4 114514199
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3924kb
input:
10 998244353
output:
11033
result:
ok 1 number(s): "11033"
Test #3:
score: 0
Accepted
time: 1ms
memory: 4276kb
input:
100 1000000007
output:
270904395
result:
ok 1 number(s): "270904395"
Test #4:
score: 0
Accepted
time: 391ms
memory: 6348kb
input:
756 1001338769
output:
901942543
result:
ok 1 number(s): "901942543"
Test #5:
score: 0
Accepted
time: 454ms
memory: 6368kb
input:
793 1009036033
output:
301770320
result:
ok 1 number(s): "301770320"
Test #6:
score: 0
Accepted
time: 394ms
memory: 6112kb
input:
759 1005587659
output:
846376219
result:
ok 1 number(s): "846376219"
Test #7:
score: 0
Accepted
time: 419ms
memory: 6352kb
input:
773 1007855479
output:
1398019
result:
ok 1 number(s): "1398019"
Test #8:
score: 0
Accepted
time: 382ms
memory: 6328kb
input:
751 1006730639
output:
321287237
result:
ok 1 number(s): "321287237"
Test #9:
score: 0
Accepted
time: 426ms
memory: 6384kb
input:
778 1007760653
output:
430322899
result:
ok 1 number(s): "430322899"
Test #10:
score: 0
Accepted
time: 455ms
memory: 6428kb
input:
798 1007543827
output:
688720826
result:
ok 1 number(s): "688720826"
Test #11:
score: 0
Accepted
time: 455ms
memory: 6432kb
input:
796 1004841413
output:
258829347
result:
ok 1 number(s): "258829347"
Test #12:
score: 0
Accepted
time: 419ms
memory: 6404kb
input:
775 1005185189
output:
744278608
result:
ok 1 number(s): "744278608"
Test #13:
score: 0
Accepted
time: 463ms
memory: 6428kb
input:
800 1006012831
output:
508549367
result:
ok 1 number(s): "508549367"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3912kb
input:
1 1001338769
output:
1
result:
ok 1 number(s): "1"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3760kb
input:
2 1001338769
output:
1
result:
ok 1 number(s): "1"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3924kb
input:
9 1009036033
output:
1780
result:
ok 1 number(s): "1780"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3932kb
input:
14 1001338769
output:
43297358
result:
ok 1 number(s): "43297358"
Extra Test:
score: 0
Extra Test Passed