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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#99683#6333. Festivals in JOI Kingdom 2chenshi87 215ms1880kbC++908b2023-04-23 14:50:242023-04-23 14:50:27

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.
  • [2023-04-23 14:50:27]
  • 评测
  • 测评结果:87
  • 用时:215ms
  • 内存:1880kb
  • [2023-04-23 14:50:24]
  • 提交

answer

#include<cstdio>
using namespace std;
const int o=40010;
int n,p,fac[o],inv[o],f[o][2],ans=1;
inline int fix(int x){return x+(x>>31&p);}
int main(){
	scanf("%d%d",&n,&p);inv[1]=1;
	for(int i=2;i<=n*2;++i) inv[i]=p-p/i*1ll*inv[p%i]%p;
	for(int i=fac[0]=inv[0]=1;i<=n*2;++i) fac[i]=fac[i-1]*1ll*i%p,inv[i]=inv[i-1]*1ll*inv[i]%p;
	f[1][1]=f[2][0]=1;
	for(int i=1;i<=n;++i){
		for(int j=0,v=f[i][0],t;j<n-i&&v;++j)
			t=v*(j+1ll)%p,f[i+j+2][0]=(f[i+j+2][0]+t*(j+2ll))%p,f[i+j+1][1]=fix(f[i+j+1][1]+t-p),v=v*(2*i-2ll+j)%p;
		for(int j=0,v=f[i][1];j<n-i&&v;++j)
			f[i+j+2][0]=(f[i+j+2][0]+v*(j+1ll))%p,f[i+j+1][1]=fix(f[i+j+1][1]+v-p),v=v*(2*i-1ll+j)%p;
	}
	for(int i=1;i<=n;++i) ans=ans*(2*i-1ll)%p;
	for(int i=2;i<=n;++i) ans=(ans+(p-f[i][0])*(n-i+1ll)%p*fac[n+i-3]%p*inv[i*2-3])%p;
	for(int i=1;i<=n;++i) ans=(ans+(p-f[i][1])*1ll*fac[n+i-2]%p*inv[i*2-2])%p;
	printf("%d",ans);
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 5
Accepted

Test #1:

score: 5
Accepted
time: 1ms
memory: 1492kb

input:

1 194903119

output:

0

result:

ok 1 number(s): "0"

Test #2:

score: 0
Accepted
time: 1ms
memory: 1528kb

input:

2 933234047

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 1ms
memory: 1756kb

input:

3 277793111

output:

2

result:

ok 1 number(s): "2"

Test #4:

score: 0
Accepted
time: 0ms
memory: 1524kb

input:

4 355321177

output:

28

result:

ok 1 number(s): "28"

Test #5:

score: 0
Accepted
time: 1ms
memory: 1608kb

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: 1ms
memory: 1536kb

input:

8 361605653

output:

1236922

result:

ok 1 number(s): "1236922"

Test #7:

score: 0
Accepted
time: 1ms
memory: 1760kb

input:

8 995512643

output:

1236922

result:

ok 1 number(s): "1236922"

Test #8:

score: 0
Accepted
time: 1ms
memory: 1556kb

input:

8 101102801

output:

1236922

result:

ok 1 number(s): "1236922"

Test #9:

score: 0
Accepted
time: 0ms
memory: 1508kb

input:

6 458322727

output:

4894

result:

ok 1 number(s): "4894"

Test #10:

score: 0
Accepted
time: 1ms
memory: 1748kb

input:

7 721691819

output:

73884

result:

ok 1 number(s): "73884"

Test #11:

score: 0
Accepted
time: 1ms
memory: 1696kb

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: 1ms
memory: 1508kb

input:

30 779092367

output:

686412377

result:

ok 1 number(s): "686412377"

Test #13:

score: 0
Accepted
time: 1ms
memory: 1764kb

input:

29 963995171

output:

128570082

result:

ok 1 number(s): "128570082"

Test #14:

score: 0
Accepted
time: 1ms
memory: 1612kb

input:

18 666092701

output:

185922458

result:

ok 1 number(s): "185922458"

Test #15:

score: 0
Accepted
time: 0ms
memory: 1696kb

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: 3ms
memory: 1880kb

input:

300 463478027

output:

89265245

result:

ok 1 number(s): "89265245"

Test #17:

score: 0
Accepted
time: 3ms
memory: 1540kb

input:

296 567610679

output:

406342763

result:

ok 1 number(s): "406342763"

Test #18:

score: 0
Accepted
time: 3ms
memory: 1704kb

input:

297 609090359

output:

128986577

result:

ok 1 number(s): "128986577"

Test #19:

score: 0
Accepted
time: 1ms
memory: 1704kb

input:

48 759569383

output:

635573072

result:

ok 1 number(s): "635573072"

Test #20:

score: 0
Accepted
time: 1ms
memory: 1468kb

input:

99 298873033

output:

285340078

result:

ok 1 number(s): "285340078"

Subtask #5:

score: 36
Accepted

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Dependency #4:

100%
Accepted

Test #21:

score: 36
Accepted
time: 215ms
memory: 1592kb

input:

3000 752129633

output:

33058561

result:

ok 1 number(s): "33058561"

Test #22:

score: 0
Accepted
time: 212ms
memory: 1592kb

input:

2993 491173567

output:

343277625

result:

ok 1 number(s): "343277625"

Test #23:

score: 0
Accepted
time: 211ms
memory: 1756kb

input:

2993 783095563

output:

776085006

result:

ok 1 number(s): "776085006"

Test #24:

score: 0
Accepted
time: 3ms
memory: 1560kb

input:

327 399783431

output:

163535283

result:

ok 1 number(s): "163535283"

Test #25:

score: 0
Accepted
time: 38ms
memory: 1572kb

input:

1233 857060207

output:

422139845

result:

ok 1 number(s): "422139845"

Test #26:

score: 0
Accepted
time: 31ms
memory: 1520kb

input:

1114 600227447

output:

598509129

result:

ok 1 number(s): "598509129"

Subtask #6:

score: 0
Time Limit Exceeded

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Dependency #4:

100%
Accepted

Dependency #5:

100%
Accepted

Test #27:

score: 0
Time Limit Exceeded

input:

20000 221054167

output:


result: