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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 |
---|---|---|---|---|---|---|---|---|---|
#812624 | #2892. 合法序列 | Fake_Jowaire# | AC ✓ | 4ms | 3748kb | C++14 | 1.2kb | 2024-12-13 17:10:31 | 2024-12-13 17:10:32 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
const int N=505,H=998244353;
int n,m,tot=0,f[N][20],ans=0;
int adc(int a,int b){return a+b>=H?a+b-H:a+b;}
int dec(int a,int b){return a<b?a-b+H:a-b;}
int mul(int a,int b){return 1ll*a*b%H;}
void add(int &a,int b){a=adc(a,b);}
void del(int &a,int b){a=dec(a,b);}
int qpow(int a,int b=H-2){
int res=1;
while(b){if(b&1) res=mul(res,a);a=mul(a,a),b>>=1;}
return res;
}
int main(){
ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
cin>>n>>m;
tot=(1<<m);
for(int S=0;S<(1<<tot);S++){
bool fl=true;
for(int i=0;i<=tot-m;i++){
int nw=0;
for(int j=0;j<m;j++) nw=(nw<<1)+(S>>(i+j)&1);
if(!(S>>nw&1)){fl=false;break;}
}
if(!fl) continue;
int cur=0;
for(int i=0;i<(1<<(m-1));i++) f[tot-1][i]=0;
for(int i=tot-m+1;i<tot;i++) cur=(cur<<1)+(S>>i&1);
f[tot-1][cur]=1;
for(int i=tot;i<n;i++){
memset(f[i],0,sizeof(f[i]));
for(int j=0;j<(1<<(m-1));j++){
if(f[i-1][j]){
for(int k:{0,1}) if(S>>((j<<1)+k)&1) add(f[i][((j<<1)+k)&((1<<(m-1))-1)],f[i-1][j]);
}
}
}
for(int i=0;i<(1<<(m-1));i++) add(ans,f[n-1][i]);
}
cout<<ans;
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 0ms
memory: 3612kb
input:
2 1
output:
1
result:
ok single line: '1'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3560kb
input:
10 3
output:
27
result:
ok single line: '27'
Test #3:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
11 3
output:
46
result:
ok single line: '46'
Test #4:
score: 0
Accepted
time: 1ms
memory: 3748kb
input:
500 3
output:
402086823
result:
ok single line: '402086823'
Test #5:
score: 0
Accepted
time: 1ms
memory: 3592kb
input:
16 4
output:
268
result:
ok single line: '268'
Test #6:
score: 0
Accepted
time: 1ms
memory: 3584kb
input:
17 4
output:
520
result:
ok single line: '520'
Test #7:
score: 0
Accepted
time: 1ms
memory: 3644kb
input:
18 4
output:
939
result:
ok single line: '939'
Test #8:
score: 0
Accepted
time: 1ms
memory: 3552kb
input:
19 4
output:
1634
result:
ok single line: '1634'
Test #9:
score: 0
Accepted
time: 1ms
memory: 3560kb
input:
20 4
output:
2678
result:
ok single line: '2678'
Test #10:
score: 0
Accepted
time: 4ms
memory: 3668kb
input:
500 4
output:
905810545
result:
ok single line: '905810545'
Test #11:
score: 0
Accepted
time: 1ms
memory: 3628kb
input:
156 3
output:
158348364
result:
ok single line: '158348364'
Test #12:
score: 0
Accepted
time: 0ms
memory: 3632kb
input:
3 1
output:
2
result:
ok single line: '2'
Test #13:
score: 0
Accepted
time: 0ms
memory: 3684kb
input:
419 1
output:
309520444
result:
ok single line: '309520444'
Test #14:
score: 0
Accepted
time: 0ms
memory: 3656kb
input:
148 1
output:
981388471
result:
ok single line: '981388471'
Test #15:
score: 0
Accepted
time: 0ms
memory: 3596kb
input:
208 1
output:
17788609
result:
ok single line: '17788609'
Test #16:
score: 0
Accepted
time: 3ms
memory: 3648kb
input:
325 4
output:
534470501
result:
ok single line: '534470501'
Test #17:
score: 0
Accepted
time: 0ms
memory: 3668kb
input:
478 1
output:
275981743
result:
ok single line: '275981743'
Test #18:
score: 0
Accepted
time: 0ms
memory: 3584kb
input:
437 3
output:
448979837
result:
ok single line: '448979837'
Test #19:
score: 0
Accepted
time: 0ms
memory: 3636kb
input:
260 3
output:
249722589
result:
ok single line: '249722589'
Test #20:
score: 0
Accepted
time: 0ms
memory: 3592kb
input:
406 2
output:
762498912
result:
ok single line: '762498912'
Test #21:
score: 0
Accepted
time: 0ms
memory: 3600kb
input:
348 2
output:
718553190
result:
ok single line: '718553190'
Test #22:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
350 1
output:
496751081
result:
ok single line: '496751081'
Test #23:
score: 0
Accepted
time: 0ms
memory: 3680kb
input:
500 1
output:
154029661
result:
ok single line: '154029661'
Test #24:
score: 0
Accepted
time: 3ms
memory: 3656kb
input:
344 4
output:
864324256
result:
ok single line: '864324256'
Test #25:
score: 0
Accepted
time: 0ms
memory: 3644kb
input:
127 3
output:
306783420
result:
ok single line: '306783420'
Test #26:
score: 0
Accepted
time: 0ms
memory: 3720kb
input:
170 4
output:
138463737
result:
ok single line: '138463737'
Test #27:
score: 0
Accepted
time: 0ms
memory: 3628kb
input:
199 3
output:
988988696
result:
ok single line: '988988696'
Test #28:
score: 0
Accepted
time: 0ms
memory: 3724kb
input:
206 3
output:
992080398
result:
ok single line: '992080398'
Test #29:
score: 0
Accepted
time: 0ms
memory: 3580kb
input:
82 2
output:
755922348
result:
ok single line: '755922348'
Test #30:
score: 0
Accepted
time: 0ms
memory: 3604kb
input:
351 2
output:
285073312
result:
ok single line: '285073312'
Test #31:
score: 0
Accepted
time: 0ms
memory: 3664kb
input:
274 1
output:
609866862
result:
ok single line: '609866862'
Test #32:
score: 0
Accepted
time: 0ms
memory: 3612kb
input:
416 3
output:
49398792
result:
ok single line: '49398792'
Test #33:
score: 0
Accepted
time: 0ms
memory: 3624kb
input:
4 2
output:
2
result:
ok single line: '2'
Test #34:
score: 0
Accepted
time: 0ms
memory: 3548kb
input:
5 2
output:
4
result:
ok single line: '4'
Test #35:
score: 0
Accepted
time: 0ms
memory: 3688kb
input:
6 2
output:
7
result:
ok single line: '7'
Test #36:
score: 0
Accepted
time: 0ms
memory: 3680kb
input:
500 2
output:
255888452
result:
ok single line: '255888452'
Test #37:
score: 0
Accepted
time: 0ms
memory: 3628kb
input:
8 3
output:
8
result:
ok single line: '8'
Test #38:
score: 0
Accepted
time: 0ms
memory: 3708kb
input:
9 3
output:
15
result:
ok single line: '15'