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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#823916#2892. 合法序列tuxun_team#AC ✓56ms3976kbC++14955b2024-12-21 10:45:472024-12-21 10:45:49

Judging History

你现在查看的是最新测评结果

  • [2024-12-21 10:45:49]
  • 评测
  • 测评结果:AC
  • 用时:56ms
  • 内存:3976kb
  • [2024-12-21 10:45:47]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int mod=998244353;
int n,k;
int a[23];
int f[503][10];
int ans=0;
void add(int &x,int y){x+=y;if(x>=mod)x-=mod;}
void dfs(int x)
{
	if(x>=16||x>=n)
	{
		for(int i=0;i<=15;i++)
		{
			if(i+k-1>min(n-1,15))continue;
			int s=0;
			for(int j=i;j<=i+k-1;j++)s=s*2+a[j];
			if(a[s]==0)return;
		}
		if(n<=16){add(ans,1);return;}
		int w=0;
		for(int i=15-k+2;i<=15;i++)w=w*2+a[i];
		for(int i=15;i<=n;i++)
		{
			for(int j=0;j<(1<<k-1);j++)f[i][j]=0;
		}
		f[15][w]=1;
		for(int i=15;i<n-1;i++)
		{
			for(int j=0;j<(1<<k-1);j++)
			{
				for(int p=0;p<2;p++)
				{
					int v=j*2+p;
					if(a[v]==0)continue;
					add(f[i+1][v&((1<<k-1)-1)],f[i][j]);
				}
			}
		}
		int lt=ans;
		for(int j=0;j<(1<<k-1);j++)add(ans,f[n-1][j]);
		return;
	}
	a[x]=0;dfs(x+1);
	a[x]=1;dfs(x+1);
}
int main()
{
	scanf("%d %d",&n,&k);
	dfs(0);
	printf("%d",ans);
	return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 1ms
memory: 3944kb

input:

2 1

output:

1

result:

ok single line: '1'

Test #2:

score: 0
Accepted
time: 0ms
memory: 3884kb

input:

10 3

output:

27

result:

ok single line: '27'

Test #3:

score: 0
Accepted
time: 0ms
memory: 3704kb

input:

11 3

output:

46

result:

ok single line: '46'

Test #4:

score: 0
Accepted
time: 5ms
memory: 3812kb

input:

500 3

output:

402086823

result:

ok single line: '402086823'

Test #5:

score: 0
Accepted
time: 0ms
memory: 3700kb

input:

16 4

output:

268

result:

ok single line: '268'

Test #6:

score: 0
Accepted
time: 1ms
memory: 3872kb

input:

17 4

output:

520

result:

ok single line: '520'

Test #7:

score: 0
Accepted
time: 1ms
memory: 3796kb

input:

18 4

output:

939

result:

ok single line: '939'

Test #8:

score: 0
Accepted
time: 1ms
memory: 3888kb

input:

19 4

output:

1634

result:

ok single line: '1634'

Test #9:

score: 0
Accepted
time: 1ms
memory: 3880kb

input:

20 4

output:

2678

result:

ok single line: '2678'

Test #10:

score: 0
Accepted
time: 3ms
memory: 3772kb

input:

500 4

output:

905810545

result:

ok single line: '905810545'

Test #11:

score: 0
Accepted
time: 2ms
memory: 3892kb

input:

156 3

output:

158348364

result:

ok single line: '158348364'

Test #12:

score: 0
Accepted
time: 1ms
memory: 3884kb

input:

3 1

output:

2

result:

ok single line: '2'

Test #13:

score: 0
Accepted
time: 49ms
memory: 3844kb

input:

419 1

output:

309520444

result:

ok single line: '309520444'

Test #14:

score: 0
Accepted
time: 17ms
memory: 3812kb

input:

148 1

output:

981388471

result:

ok single line: '981388471'

Test #15:

score: 0
Accepted
time: 24ms
memory: 3868kb

input:

208 1

output:

17788609

result:

ok single line: '17788609'

Test #16:

score: 0
Accepted
time: 0ms
memory: 3832kb

input:

325 4

output:

534470501

result:

ok single line: '534470501'

Test #17:

score: 0
Accepted
time: 56ms
memory: 3892kb

input:

478 1

output:

275981743

result:

ok single line: '275981743'

Test #18:

score: 0
Accepted
time: 5ms
memory: 3888kb

input:

437 3

output:

448979837

result:

ok single line: '448979837'

Test #19:

score: 0
Accepted
time: 3ms
memory: 3904kb

input:

260 3

output:

249722589

result:

ok single line: '249722589'

Test #20:

score: 0
Accepted
time: 15ms
memory: 3756kb

input:

406 2

output:

762498912

result:

ok single line: '762498912'

Test #21:

score: 0
Accepted
time: 13ms
memory: 3836kb

input:

348 2

output:

718553190

result:

ok single line: '718553190'

Test #22:

score: 0
Accepted
time: 41ms
memory: 3776kb

input:

350 1

output:

496751081

result:

ok single line: '496751081'

Test #23:

score: 0
Accepted
time: 55ms
memory: 3884kb

input:

500 1

output:

154029661

result:

ok single line: '154029661'

Test #24:

score: 0
Accepted
time: 2ms
memory: 3888kb

input:

344 4

output:

864324256

result:

ok single line: '864324256'

Test #25:

score: 0
Accepted
time: 2ms
memory: 3976kb

input:

127 3

output:

306783420

result:

ok single line: '306783420'

Test #26:

score: 0
Accepted
time: 2ms
memory: 3876kb

input:

170 4

output:

138463737

result:

ok single line: '138463737'

Test #27:

score: 0
Accepted
time: 3ms
memory: 3880kb

input:

199 3

output:

988988696

result:

ok single line: '988988696'

Test #28:

score: 0
Accepted
time: 3ms
memory: 3820kb

input:

206 3

output:

992080398

result:

ok single line: '992080398'

Test #29:

score: 0
Accepted
time: 3ms
memory: 3812kb

input:

82 2

output:

755922348

result:

ok single line: '755922348'

Test #30:

score: 0
Accepted
time: 13ms
memory: 3812kb

input:

351 2

output:

285073312

result:

ok single line: '285073312'

Test #31:

score: 0
Accepted
time: 31ms
memory: 3888kb

input:

274 1

output:

609866862

result:

ok single line: '609866862'

Test #32:

score: 0
Accepted
time: 5ms
memory: 3896kb

input:

416 3

output:

49398792

result:

ok single line: '49398792'

Test #33:

score: 0
Accepted
time: 0ms
memory: 3700kb

input:

4 2

output:

2

result:

ok single line: '2'

Test #34:

score: 0
Accepted
time: 0ms
memory: 3872kb

input:

5 2

output:

4

result:

ok single line: '4'

Test #35:

score: 0
Accepted
time: 0ms
memory: 3824kb

input:

6 2

output:

7

result:

ok single line: '7'

Test #36:

score: 0
Accepted
time: 19ms
memory: 3836kb

input:

500 2

output:

255888452

result:

ok single line: '255888452'

Test #37:

score: 0
Accepted
time: 0ms
memory: 3736kb

input:

8 3

output:

8

result:

ok single line: '8'

Test #38:

score: 0
Accepted
time: 0ms
memory: 3952kb

input:

9 3

output:

15

result:

ok single line: '15'