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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#333882 | #8047. DFS Order 4 | Larunatrecy | AC ✓ | 492ms | 6420kb | C++14 | 882b | 2024-02-20 18:36:04 | 2024-02-20 18:36:05 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
const int N = 880;
int n,mod;
int inv[N];
int dp[N][N],f[N];//点数,层数
inline int myplus(int a,int b){return a+b>=mod?a+b-mod:a+b;}
inline int reduce(int a,int b){return a-b<0?a-b+mod:a-b;}
int main()
{
cin>>n>>mod;
if(n==1)
{
cout<<1%mod;
return 0;
}
inv[1]=1;
for(int i=2;i<=n;i++)inv[i]=1ll*inv[mod%i]*(mod-mod/i)%mod;
dp[1][0]=1;
for(int i=2;i<=n;i++)
for(int j=0;j<=i;j++)
{
dp[i][j]=myplus(dp[i][j],dp[i-1][j+1]);
if(j==0)dp[i][0]=myplus(dp[i][0],dp[i-1][0]);
for(int k=1;k<=i-j;k++)
{
dp[i][j]=myplus(dp[i][j],1ll*dp[i-k][j]*dp[k-1][0]%mod);
if(j)dp[i][j]=reduce(dp[i][j],1ll*dp[i-k][j-1]*(dp[k-1][0]+(k==1))%mod);
}
dp[i][j]=1ll*dp[i][j]*inv[i]%mod;
}
int ans=1ll*dp[n-1][0]*inv[n]%mod;
for(int i=1;i<=n;i++)ans=1ll*ans*i%mod;
cout<<ans;
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3556kb
input:
4 114514199
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3672kb
input:
10 998244353
output:
11033
result:
ok 1 number(s): "11033"
Test #3:
score: 0
Accepted
time: 2ms
memory: 3892kb
input:
100 1000000007
output:
270904395
result:
ok 1 number(s): "270904395"
Test #4:
score: 0
Accepted
time: 419ms
memory: 6288kb
input:
756 1001338769
output:
901942543
result:
ok 1 number(s): "901942543"
Test #5:
score: 0
Accepted
time: 483ms
memory: 6404kb
input:
793 1009036033
output:
301770320
result:
ok 1 number(s): "301770320"
Test #6:
score: 0
Accepted
time: 420ms
memory: 6228kb
input:
759 1005587659
output:
846376219
result:
ok 1 number(s): "846376219"
Test #7:
score: 0
Accepted
time: 447ms
memory: 6288kb
input:
773 1007855479
output:
1398019
result:
ok 1 number(s): "1398019"
Test #8:
score: 0
Accepted
time: 411ms
memory: 6200kb
input:
751 1006730639
output:
321287237
result:
ok 1 number(s): "321287237"
Test #9:
score: 0
Accepted
time: 456ms
memory: 6312kb
input:
778 1007760653
output:
430322899
result:
ok 1 number(s): "430322899"
Test #10:
score: 0
Accepted
time: 488ms
memory: 6420kb
input:
798 1007543827
output:
688720826
result:
ok 1 number(s): "688720826"
Test #11:
score: 0
Accepted
time: 488ms
memory: 6368kb
input:
796 1004841413
output:
258829347
result:
ok 1 number(s): "258829347"
Test #12:
score: 0
Accepted
time: 447ms
memory: 6172kb
input:
775 1005185189
output:
744278608
result:
ok 1 number(s): "744278608"
Test #13:
score: 0
Accepted
time: 492ms
memory: 6268kb
input:
800 1006012831
output:
508549367
result:
ok 1 number(s): "508549367"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3608kb
input:
1 1001338769
output:
1
result:
ok 1 number(s): "1"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
2 1001338769
output:
1
result:
ok 1 number(s): "1"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3728kb
input:
9 1009036033
output:
1780
result:
ok 1 number(s): "1780"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3660kb
input:
14 1001338769
output:
43297358
result:
ok 1 number(s): "43297358"
Extra Test:
score: 0
Extra Test Passed