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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#104365#6333. Festivals in JOI Kingdom 2oscaryang51 749ms49608kbC++201.4kb2023-05-10 14:46:072023-05-10 14:46:11

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-05-10 14:46:11]
  • 评测
  • 测评结果:51
  • 用时:749ms
  • 内存:49608kb
  • [2023-05-10 14:46:07]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int N=3005;

int n,P,c[N][N];
int o,w,f[2][N][N][3],ans,all;

inline void inc(int &x,int y) { x+=y-P; x+=(x>>31)&P; }
inline void dec(int &x,int y) { x-=y; x+=(x>>31)&P; }
inline int pls(int x,int y) { x+=y-P; x+=(x>>31)&P; return x; }

int main() {
	cin>>n>>P;
	
	for(int i=0;i<N;i++) {
		c[i][0]=1;
		for(int j=1;j<=i;j++) inc(c[i][j]=c[i-1][j],c[i-1][j-1]);
	}
	all=1; for(int i=1;i<=(2*n);i+=2) all=1ll*all*i%P;
	//cout<<all<<endl;
	
	int *F;
	o=0; w=1; f[o][0][0][0]=1;
	for(int i=0,val;i<2*n;i++,swap(o,w)) 
		for(int j=0;j<=i;j++) 
			for(int k=0;k+j<=i;k++) if((k+j&1) == (i&1)) {
				/* debug
				cout<<endl;
				cout<<i<<" "<<j<<" "<<k<<endl;
				cout<<0<<" "<<f[o][j][k][0]<<endl;
				cout<<1<<" "<<f[o][j][k][1]<<endl;
				cout<<2<<" "<<f[o][j][k][2]<<endl;
				*/
				// l
				F = f[o][j][k];
				inc(f[w][j][k+1][1],pls(F[0],F[1]));
				inc(f[w][j][k+1][2],F[2]);
				// r 1
				if(k) inc(f[w][j+k-1][0][0],F[1]);
				if(j) inc(f[w][j-1][k][0],F[2]);
				// r 2
				if(j) {
					inc(f[w][j-1][k][0],1ll*j*F[0]%P);
					inc(f[w][j-1][k][1],1ll*j*F[1]%P);
					inc(f[w][j-1][k][2],1ll*(j-1)*F[2]%P);
				}
				// r 3
				if(k) inc(f[w][j+k-1][0][2],1ll*(k-1)*F[1]%P);
				//clear
				f[o][j][k][0]=f[o][j][k][1]=f[o][j][k][2]=0;
			}
	dec(ans=all,f[o][0][0][0]);
	cout<<ans<<endl;
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 5
Accepted

Test #1:

score: 5
Accepted
time: 4ms
memory: 40308kb

input:

1 194903119

output:

0

result:

ok 1 number(s): "0"

Test #2:

score: 0
Accepted
time: 1ms
memory: 40236kb

input:

2 933234047

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 3ms
memory: 40304kb

input:

3 277793111

output:

2

result:

ok 1 number(s): "2"

Test #4:

score: 0
Accepted
time: 1ms
memory: 39772kb

input:

4 355321177

output:

28

result:

ok 1 number(s): "28"

Test #5:

score: 0
Accepted
time: 6ms
memory: 40440kb

input:

5 306636893

output:

358

result:

ok 1 number(s): "358"

Subtask #2:

score: 5
Accepted

Dependency #1:

100%
Accepted

Test #6:

score: 5
Accepted
time: 2ms
memory: 39352kb

input:

8 361605653

output:

1236922

result:

ok 1 number(s): "1236922"

Test #7:

score: 0
Accepted
time: 1ms
memory: 40180kb

input:

8 995512643

output:

1236922

result:

ok 1 number(s): "1236922"

Test #8:

score: 0
Accepted
time: 1ms
memory: 40444kb

input:

8 101102801

output:

1236922

result:

ok 1 number(s): "1236922"

Test #9:

score: 0
Accepted
time: 2ms
memory: 40004kb

input:

6 458322727

output:

4894

result:

ok 1 number(s): "4894"

Test #10:

score: 0
Accepted
time: 4ms
memory: 39420kb

input:

7 721691819

output:

73884

result:

ok 1 number(s): "73884"

Test #11:

score: 0
Accepted
time: 1ms
memory: 40412kb

input:

7 370629137

output:

73884

result:

ok 1 number(s): "73884"

Subtask #3:

score: 27
Accepted

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Test #12:

score: 27
Accepted
time: 4ms
memory: 39396kb

input:

30 779092367

output:

686412377

result:

ok 1 number(s): "686412377"

Test #13:

score: 0
Accepted
time: 4ms
memory: 40708kb

input:

29 963995171

output:

128570082

result:

ok 1 number(s): "128570082"

Test #14:

score: 0
Accepted
time: 0ms
memory: 40044kb

input:

18 666092701

output:

185922458

result:

ok 1 number(s): "185922458"

Test #15:

score: 0
Accepted
time: 1ms
memory: 40136kb

input:

14 671243719

output:

623913899

result:

ok 1 number(s): "623913899"

Subtask #4:

score: 14
Accepted

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Test #16:

score: 14
Accepted
time: 749ms
memory: 49504kb

input:

300 463478027

output:

89265245

result:

ok 1 number(s): "89265245"

Test #17:

score: 0
Accepted
time: 727ms
memory: 48112kb

input:

296 567610679

output:

406342763

result:

ok 1 number(s): "406342763"

Test #18:

score: 0
Accepted
time: 738ms
memory: 49608kb

input:

297 609090359

output:

128986577

result:

ok 1 number(s): "128986577"

Test #19:

score: 0
Accepted
time: 4ms
memory: 40660kb

input:

48 759569383

output:

635573072

result:

ok 1 number(s): "635573072"

Test #20:

score: 0
Accepted
time: 28ms
memory: 42320kb

input:

99 298873033

output:

285340078

result:

ok 1 number(s): "285340078"

Subtask #5:

score: 0
Time Limit Exceeded

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Dependency #4:

100%
Accepted

Test #21:

score: 0
Time Limit Exceeded

input:

3000 752129633

output:


result:


Subtask #6:

score: 0
Skipped

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Dependency #4:

100%
Accepted

Dependency #5:

0%