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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#36834 | #2447. Domino Covering | NaCly_Fish | AC ✓ | 1ms | 3848kb | C++ | 6.2kb | 2022-06-29 02:25:16 | 2024-10-07 15:50:46 |
Judging History
你现在查看的是测评时间为 2024-10-07 15:50:46 的历史记录
- [2023-08-10 23:21:45]
- System Update: QOJ starts to keep a history of the judgings of all the submissions.
- [2022-06-29 02:25:16]
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answer
#pragma GCC optimize (2)
#include<cstdio>
#include<iostream>
#include<cstring>
#include<algorithm>
#include<vector>
#include<cmath>
#include<ctime>
#define ll long long
#define N 10003
#define M 180
#define mid ((l+r)>>1)
using namespace std;
int siz,p;
inline int power(int a,int t){
int res = 1;
while(t){
if(t&1) res = (ll)res*a%p;
a = (ll)a*a%p;
t >>= 1;
}
return res;
}
/*
namespace Berlekamp_Massey{
inline void add(int &x,int y){
x += y;
if(x>=p) x -= p;
}
inline void dec(int &x,int y){
x -= y;
if(x<0) x += p;
}
int cnt;
int Fail[N],delta[N];
vector<int> R[N];
int solve(int n,const int *a,int *f){
int k = 0;
memset(Fail,0,sizeof(Fail));
memset(delta,0,sizeof(delta));
R[0].clear();
cnt = 0;
for(int i=1;i<=n;++i){
if(cnt==0){
if(a[i]){
Fail[cnt++] = i;
delta[i] = a[i];
R[cnt].resize(0);
R[cnt].resize(i,0);
}
continue;
}
int sum = 0,m = R[cnt].size();
delta[i] = a[i];
Fail[cnt] = i;
for(int j=0;j<m;++j)
sum = (sum+(ll)a[i-j-1]*R[cnt][j])%p;
dec(delta[i],sum);
if (!delta[i]) continue;
int id = cnt-1,v = i-Fail[id]+(int)R[id].size();
for(int j=0;j<cnt;++j){
if(i-Fail[j]+(int)R[j].size()<v){
id = j;
v = i-Fail[j]+(int)R[j].size();
}
}
int tmp = (ll)delta[i]*power(delta[Fail[id]],p-2)%p;
R[cnt+1] = R[cnt];
while(R[cnt+1].size()<v) R[cnt+1].push_back(0);
add(R[cnt+1][i-Fail[id]-1],tmp);
for(int j=0;j<R[id].size();++j)
dec(R[cnt+1][i-Fail[id]+j],(ll)tmp*R[id][j]%p);
cnt++;
}
k = R[cnt].size();
for(int i=1;i<=k;++i) f[i] = R[cnt][i-1];
return k;
}
}
*/
inline int add(const int& x,const int& y){ return x+y>=p?x+y-p:x+y; }
inline int dec(const int& x,const int& y){ return x<y?x-y+p:x-y; }
inline void mod(const int *f,const int *g,int n,int m,int *R){
static int a[N],b[N],q[N];
memcpy(a,f,(n+1)<<2),memcpy(b,g,(m+1)<<2);
for(int i=n-m;~i;--i){
q[i] = a[i+m];
for(int j=0;j<=m;++j)
a[m+i-j] = (a[m+i-j]-(ll)q[i]*b[m-j])%p;
}
for(int i=0;i<m;++i) R[i] = a[i];
}
inline void multiply(const int *f,const int *g,int n,int m,int *r){
static int h[N];
memset(h,0,(n+m+1)<<2);
for(int i=0;i<=n;++i)
for(int j=0;j<=m;++j)
h[i+j] = (h[i+j]+(ll)f[i]*g[j])%p;
memcpy(r,h,(n+m+1)<<2);
}
struct complex{
int a,b;
complex(int a=0,int b=0):a(a),b(b){}
complex operator + (const complex& x) const{
return complex((a+x.a)%p,(b+x.b)%p);
}
complex operator - (const complex& x) const{
return complex((a-x.a)%p,(b-x.b)%p);
}
complex operator * (const complex& x) const{
complex res;
return complex(((ll)a*x.a+5ll*b*x.b)%p,((ll)a*x.b+(ll)b*x.a)%p);
}
};
inline complex power(complex a,ll t){
complex res = complex(1,0);
while(t){
if(t&1) res = res*a;
a = a*a;
t >>= 1;
}
return res;
}
inline int fib(ll n){
if(p==2) return n%3!=0;
int inv2 = (p+1)>>1;
complex x = complex(inv2,inv2);
complex y = complex(inv2,p-inv2);
complex res = power(x,n)-power(y,n);
return (res.b+p)%p;
}
int n,ans,lim;
ll m;
int B[36][36],D[36][36],F[M][36][36];
int g[M],cf[M];
int a[M],b[M],res[M];
int dc[36][36];
int main(){
int T,k;
scanf("%d",&T);
while(T--){
scanf("%d%lld%d",&n,&m,&p);
if((n&1)&(m&1)){
puts("0");
continue;
}
if(n==1){
puts("1");
continue;
}
if(n==2){
printf("%d\n",fib(m+1));
continue;
}
//printf("n = %d,m = %lld\n",n,m);
for(int i=0;i<=n;++i) dc[0][i] = 1;
for(int i=1;i<=n;++i){
dc[i][0] = 1;
for(int j=1;j<=n;++j)
dc[i][j] = ((dc[i-1][j]+dc[i][j-1])%p+dc[i-1][j-1])%p;
}
siz = n,lim = (n<<1)+2;
memset(F[0],0,sizeof(F[0]));
memset(F[1],0,sizeof(F[1]));
for(int i=0;i<n;++i) F[0][i][i] = 1;
for(int i=0;i<(n-1);++i){
F[1][i][i+1] = 1;
F[1][i+1][i] = p-1;
}
for(int i=2;i<=lim;++i){
for(int j=0;j<n;++j)
for(int k=0;k<n;++k){
F[i][j][k] = p-F[i-2][j][k];
if(k-1>=0) F[i][j][k] = add(F[i][j][k],F[i-1][j][k-1]);
if(k+1<n) F[i][j][k] = dec(F[i][j][k],F[i-1][j][k+1]);
}
}
for(int i=0;i<n;++i) cf[i+1] = -dc[i][n-i];
reverse(cf+1,cf+n+1);
memset(a,0,sizeof(a)),memset(b,0,sizeof(b));
memset(res,0,sizeof(res));
//memset(a,0,(n+1)<<3),memset(b,0,(n+1)<<3);
//memset(res,0,(n+1)<<3);
for(int i=1;i<=n;++i) a[n-i] = p-cf[i];
a[n] = b[1] = res[0] = 1;
int bt = 1,rt = 0,tn = n;
ll tm = m;
m >>= 1;
while(1){
if(m&1){
multiply(res,b,rt,bt,res);
rt += bt;
if(rt>=n) mod(res,a,rt,n,res);
rt = min(rt,n-1);
}
m >>= 1;
if(m==0) break;
multiply(b,b,bt,bt,b);
bt <<= 1;
if(bt>=n) mod(b,a,bt<<1,n,b);
bt = min(bt,n-1);
}
//for(int i=0;i<n;++i) printf("%d ",res[i]);
//putchar('\n');
memset(D,0,sizeof(D));
memset(B,0,sizeof(B));
for(int i=0;i<(n<<1);++i){
if((tm&1)!=(i&1)) continue;
for(int t=0;t<n;++t)
for(int j=0;j<n;++j)
D[t][j] = (D[t][j]+(ll)res[i>>1]*F[i][t][j])%p;
}
for(int i=0;i<n;++i){
if((i&1)==0) continue;
for(int j=0;j<n;++j){
if(D[i][j]==0) continue;
B[i>>1][j>>1] = D[i][j];
}
}
n >>= 1;
int d,flag = 1;
for(int i=0;i<n;++i){
int j = i;
while(j<n&&B[j][i]==0) ++j;
if(j==n) continue;
if(j!=i){
for(int k=i;k<n;++k) swap(B[i][k],B[j][k]);
flag ^= 1;
}
for(j=i+1;j<n;++j){
if(B[j][i]==0) continue;
d = (ll)B[j][i]*power(B[i][i],p-2)%p;
for(int k=i;k<n;++k) B[j][k] = (B[j][k]-(ll)d*B[i][k])%p;
}
}
ans = 1;
for(int i=0;i<n;++i) ans = (ll)ans*B[i][i]%p;
if(tn%4==2||tn%4==3) ans = ((tm-1)>>1)&1?ans:-ans;
if(flag==0) ans = p-ans;
ans = (ans%p+p)%p;
printf("%d\n",ans);
}
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 3848kb
input:
6 2 2 23 2 3 233 3 3 2333 3 4 23333 4 4 2332333 5 251346744251346744 998244353
output:
2 3 0 11 36 295381485
result:
ok 6 lines