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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#337862#7766. 栞Harry27182100 ✓114ms4688kbC++141.0kb2024-02-25 15:17:412024-02-25 15:17:41

Judging History

你现在查看的是最新测评结果

  • [2024-02-25 15:17:41]
  • 评测
  • 测评结果:100
  • 用时:114ms
  • 内存:4688kb
  • [2024-02-25 15:17:41]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
int n,m,a[505],fac[505],g[505],f[505][505];
const int mod=998244353;
void Add(int &x,int y){x=(x+y>=mod?x+y-mod:x+y);}
int main()
{
    cin.tie(0)->sync_with_stdio(0);
    cin>>n>>m;
    for(int i=1;i<=n;i++)cin>>a[i];
    fac[0]=1;
    for(int i=1;i<=n;i++)fac[i]=1ll*fac[i-1]*i%mod;
    for(int i=1;i<=n;i++)
    {
    	g[i]=fac[i];
    	for(int j=1;j<i;j++)Add(g[i],mod-1ll*g[j]*fac[i-j]%mod);
	}
	f[0][0]=1;
	for(int i=1;i<=n;i++)
	{
		for(int j=0;j<=n;j++)
		{
			for(int k=j;k<=n;k++)Add(f[i][k],1ll*f[i-1][k-j]*g[j]%mod);
		}
	}
	int pos=0;
	for(int i=1;i<n;i++)if(a[i]>a[i+1]){pos=i;break;}
	if(pos==0)
	{
		int ans=0;
		for(int i=m;i<=n;i++)Add(ans,f[i][n]);
		cout<<ans<<'\n';return 0;
	}
	int ans=0,mn=0x3f3f3f3f;
	for(int i=pos+1;i<=n;i++)
	{
		if(i>pos+1)mn=min(mn,a[i]);
		if(mn<a[pos]||(i>pos+1&&a[i]<a[i-1]))break;
		int now=m+i-n-1;
		if(now)Add(ans,1ll*f[now][pos]*fac[i-pos-1]%mod);
	}
	cout<<ans<<'\n';
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Subtask #1:

score: 10
Accepted

Test #1:

score: 10
Accepted
time: 1ms
memory: 3688kb

input:

6 1
1 2 3 4 5 6

output:

720

result:

ok 1 number(s): "720"

Test #2:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

6 3
1 2 5 3 4 6

output:

0

result:

ok 1 number(s): "0"

Test #3:

score: 0
Accepted
time: 0ms
memory: 3632kb

input:

6 3
1 2 4 3 6 5

output:

3

result:

ok 1 number(s): "3"

Test #4:

score: 0
Accepted
time: 0ms
memory: 3668kb

input:

6 5
1 2 3 5 4 6

output:

4

result:

ok 1 number(s): "4"

Test #5:

score: 0
Accepted
time: 0ms
memory: 3684kb

input:

6 5
1 2 3 5 4 6

output:

4

result:

ok 1 number(s): "4"

Test #6:

score: 0
Accepted
time: 0ms
memory: 3508kb

input:

6 4
1 3 2 4 6 5

output:

3

result:

ok 1 number(s): "3"

Test #7:

score: 0
Accepted
time: 1ms
memory: 3636kb

input:

6 5
1 3 2 5 4 6

output:

2

result:

ok 1 number(s): "2"

Test #8:

score: 0
Accepted
time: 1ms
memory: 3664kb

input:

6 3
1 2 3 6 5 4

output:

13

result:

ok 1 number(s): "13"

Test #9:

score: 0
Accepted
time: 0ms
memory: 3708kb

input:

6 4
1 2 5 4 3 6

output:

3

result:

ok 1 number(s): "3"

Test #10:

score: 0
Accepted
time: 0ms
memory: 3632kb

input:

6 3
1 2 5 4 3 6

output:

0

result:

ok 1 number(s): "0"

Subtask #2:

score: 20
Accepted

Dependency #1:

100%
Accepted

Test #11:

score: 20
Accepted
time: 0ms
memory: 3644kb

input:

9 9
1 2 3 4 5 6 7 8 9

output:

1

result:

ok 1 number(s): "1"

Test #12:

score: 0
Accepted
time: 1ms
memory: 3624kb

input:

9 3
1 2 3 4 5 6 9 7 8

output:

3447

result:

ok 1 number(s): "3447"

Test #13:

score: 0
Accepted
time: 1ms
memory: 3720kb

input:

9 7
1 3 2 4 6 5 7 8 9

output:

3

result:

ok 1 number(s): "3"

Test #14:

score: 0
Accepted
time: 1ms
memory: 3628kb

input:

9 5
1 2 3 4 5 6 7 9 8

output:

531

result:

ok 1 number(s): "531"

Test #15:

score: 0
Accepted
time: 0ms
memory: 3640kb

input:

9 9
1 4 3 2 5 6 7 8 9

output:

1

result:

ok 1 number(s): "1"

Test #16:

score: 0
Accepted
time: 0ms
memory: 3576kb

input:

9 2
1 2 3 4 5 6 7 9 8

output:

29093

result:

ok 1 number(s): "29093"

Test #17:

score: 0
Accepted
time: 0ms
memory: 3668kb

input:

9 4
1 2 3 4 5 6 7 9 8

output:

2109

result:

ok 1 number(s): "2109"

Test #18:

score: 0
Accepted
time: 0ms
memory: 3676kb

input:

9 8
1 2 3 5 4 7 6 8 9

output:

4

result:

ok 1 number(s): "4"

Test #19:

score: 0
Accepted
time: 0ms
memory: 3572kb

input:

9 7
1 2 3 4 5 7 6 9 8

output:

23

result:

ok 1 number(s): "23"

Test #20:

score: 0
Accepted
time: 0ms
memory: 3652kb

input:

9 7
1 2 3 4 5 7 6 9 8

output:

23

result:

ok 1 number(s): "23"

Subtask #3:

score: 30
Accepted

Test #21:

score: 30
Accepted
time: 93ms
memory: 4664kb

input:

500 369
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

151242732

result:

ok 1 number(s): "151242732"

Test #22:

score: 0
Accepted
time: 97ms
memory: 4556kb

input:

500 261
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

175105582

result:

ok 1 number(s): "175105582"

Test #23:

score: 0
Accepted
time: 97ms
memory: 4544kb

input:

500 79
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 1...

output:

328555836

result:

ok 1 number(s): "328555836"

Test #24:

score: 0
Accepted
time: 97ms
memory: 4640kb

input:

500 306
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

738246233

result:

ok 1 number(s): "738246233"

Test #25:

score: 0
Accepted
time: 97ms
memory: 4544kb

input:

500 291
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

90157368

result:

ok 1 number(s): "90157368"

Test #26:

score: 0
Accepted
time: 97ms
memory: 4660kb

input:

500 268
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

582110163

result:

ok 1 number(s): "582110163"

Test #27:

score: 0
Accepted
time: 97ms
memory: 4636kb

input:

500 295
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

551109392

result:

ok 1 number(s): "551109392"

Test #28:

score: 0
Accepted
time: 98ms
memory: 4640kb

input:

500 137
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

709320534

result:

ok 1 number(s): "709320534"

Test #29:

score: 0
Accepted
time: 99ms
memory: 4596kb

input:

500 66
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 1...

output:

735053639

result:

ok 1 number(s): "735053639"

Test #30:

score: 0
Accepted
time: 89ms
memory: 4608kb

input:

500 233
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

676167049

result:

ok 1 number(s): "676167049"

Subtask #4:

score: 40
Accepted

Dependency #1:

100%
Accepted

Dependency #2:

100%
Accepted

Dependency #3:

100%
Accepted

Test #31:

score: 40
Accepted
time: 97ms
memory: 4600kb

input:

500 198
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

830163792

result:

ok 1 number(s): "830163792"

Test #32:

score: 0
Accepted
time: 109ms
memory: 4596kb

input:

500 432
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 80 78 79 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

409343845

result:

ok 1 number(s): "409343845"

Test #33:

score: 0
Accepted
time: 97ms
memory: 4556kb

input:

500 265
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

194041644

result:

ok 1 number(s): "194041644"

Test #34:

score: 0
Accepted
time: 97ms
memory: 4544kb

input:

500 173
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

526227080

result:

ok 1 number(s): "526227080"

Test #35:

score: 0
Accepted
time: 97ms
memory: 4560kb

input:

500 483
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

614441401

result:

ok 1 number(s): "614441401"

Test #36:

score: 0
Accepted
time: 89ms
memory: 4688kb

input:

500 243
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

284882224

result:

ok 1 number(s): "284882224"

Test #37:

score: 0
Accepted
time: 98ms
memory: 4548kb

input:

500 282
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

308933889

result:

ok 1 number(s): "308933889"

Test #38:

score: 0
Accepted
time: 114ms
memory: 4660kb

input:

500 231
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

131213230

result:

ok 1 number(s): "131213230"

Test #39:

score: 0
Accepted
time: 110ms
memory: 4684kb

input:

500 415
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 100 99 ...

output:

590026968

result:

ok 1 number(s): "590026968"

Test #40:

score: 0
Accepted
time: 98ms
memory: 4608kb

input:

500 344
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...

output:

124432123

result:

ok 1 number(s): "124432123"