QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#526374 | #8047. DFS Order 4 | Crying | AC ✓ | 1468ms | 6224kb | C++14 | 1.2kb | 2024-08-21 14:31:57 | 2024-08-21 14:31:58 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
const int MAXN = 810; int mod;
int addv(int x,int y){return (x+y>=mod)?(x+y-mod):(x+y);}
int subv(int x,int y){return (x>=y)?(x-y):(x-y+mod);}
void add(int& x,int y){x = addv(x,y);}
void sub(int& x,int y){x = subv(x,y);}
int qpow(int a,int n){
int res = 1; a%=mod;
while(n){
if(n&1)res = 1ll*res*a%mod;
n>>=1; a = 1ll*a*a%mod;
}
return res;
}
int qinv(int a){return qpow(a,mod-2);}
//
int n,inv[MAXN],g[MAXN][MAXN]; //单点/序列
int main(){
cin>>n>>mod;
for(int i=1;i<=n;i++)inv[i] = qinv(i);
for(int i=0;i<=n+1;i++)g[0][i] = g[1][i] = 1;
for(int i=2;i<n;i++){
for(int j=0;j<=n;j++){
g[i][j] = g[i-1][j+1];
for(int k=1;k<i-1;k++){
add(g[i][j],1ll*g[k][j]*g[i-1-k][0]%mod);
}
if(j){
for(int k=1;k<=i-1;k++){
sub(g[i][j],1ll*g[k][j-1]*g[i-1-k][0]%mod);
}
}
g[i][j] = 1ll*g[i][j]*inv[i]%mod;
}
}
//
int ans = g[n-1][0];
for(int i=1;i<n;i++)ans = 1ll*ans*i%mod;
cout<<ans<<endl;
return 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: 0ms
memory: 3636kb
input:
4 114514199
output:
2
result:
ok 1 number(s): "2"
Test #2:
score: 0
Accepted
time: 0ms
memory: 3644kb
input:
10 998244353
output:
11033
result:
ok 1 number(s): "11033"
Test #3:
score: 0
Accepted
time: 3ms
memory: 3812kb
input:
100 1000000007
output:
270904395
result:
ok 1 number(s): "270904395"
Test #4:
score: 0
Accepted
time: 1239ms
memory: 5992kb
input:
756 1001338769
output:
901942543
result:
ok 1 number(s): "901942543"
Test #5:
score: 0
Accepted
time: 1430ms
memory: 6008kb
input:
793 1009036033
output:
301770320
result:
ok 1 number(s): "301770320"
Test #6:
score: 0
Accepted
time: 1256ms
memory: 6012kb
input:
759 1005587659
output:
846376219
result:
ok 1 number(s): "846376219"
Test #7:
score: 0
Accepted
time: 1323ms
memory: 5972kb
input:
773 1007855479
output:
1398019
result:
ok 1 number(s): "1398019"
Test #8:
score: 0
Accepted
time: 1217ms
memory: 5984kb
input:
751 1006730639
output:
321287237
result:
ok 1 number(s): "321287237"
Test #9:
score: 0
Accepted
time: 1354ms
memory: 5996kb
input:
778 1007760653
output:
430322899
result:
ok 1 number(s): "430322899"
Test #10:
score: 0
Accepted
time: 1459ms
memory: 6156kb
input:
798 1007543827
output:
688720826
result:
ok 1 number(s): "688720826"
Test #11:
score: 0
Accepted
time: 1445ms
memory: 6208kb
input:
796 1004841413
output:
258829347
result:
ok 1 number(s): "258829347"
Test #12:
score: 0
Accepted
time: 1334ms
memory: 6060kb
input:
775 1005185189
output:
744278608
result:
ok 1 number(s): "744278608"
Test #13:
score: 0
Accepted
time: 1468ms
memory: 6224kb
input:
800 1006012831
output:
508549367
result:
ok 1 number(s): "508549367"
Test #14:
score: 0
Accepted
time: 0ms
memory: 3532kb
input:
1 1001338769
output:
1
result:
ok 1 number(s): "1"
Test #15:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
2 1001338769
output:
1
result:
ok 1 number(s): "1"
Test #16:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
9 1009036033
output:
1780
result:
ok 1 number(s): "1780"
Test #17:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
14 1001338769
output:
43297358
result:
ok 1 number(s): "43297358"
Extra Test:
score: 0
Extra Test Passed