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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 |
---|---|---|---|---|---|---|---|---|---|
#36827 | #2447. Domino Covering | NaCly_Fish | TL | 0ms | 0kb | C++ | 6.7kb | 2022-06-28 23:05:38 | 2022-06-28 23:05:38 |
Judging History
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;
}
}
struct mat{
int a[36][36];
inline mat(){ memset(a,0,sizeof(a)); }
};
inline mat operator * (const mat& lhs,const mat& rhs){
mat res = mat();
for(int i=0;i<siz;++i)
for(int j=0;j<siz;++j)
for(int k=0;k<siz;++k)
res.a[i][j] = (res.a[i][j]+(ll)lhs.a[i][k]*rhs.a[k][j])%p;
return res;
}
inline mat operator * (const int& lhs,const mat& rhs){
mat res = mat();
for(int i=0;i<siz;++i)
for(int j=0;j<siz;++j)
res.a[i][j] = (ll)lhs*rhs.a[i][j]%p;
return res;
}
inline mat operator + (const mat& lhs,const mat& rhs){
mat res;
for(int i=0;i<siz;++i)
for(int j=0;j<siz;++j)
res.a[i][j] = (lhs.a[i][j]+rhs.a[i][j])%p;
return res;
}
inline mat operator - (const mat& lhs,const mat& rhs){
mat res;
for(int i=0;i<siz;++i)
for(int j=0;j<siz;++j)
res.a[i][j] = (lhs.a[i][j]-rhs.a[i][j]+p)%p;
return res;
}
inline mat power(mat a,ll t){
mat res = mat();
for(int i=0;i<siz;++i) res.a[i][i] = 1;
while(t){
if(t&1) res = res*a;
t >>= 1;
if(t==0) break;
a = a*a;
}
return res;
}
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] = (ll)a[i+m]*power(b[m],p-2)%p;
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){
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;
}
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] = (F[i][j][k]+F[i-1][j][k-1])%p;
if(k+1<n) F[i][j][k] = (F[i][j][k]-F[i-1][j][k+1]+p)%p;
}
}
k = (n<<1);
for(int i=1;i<=k;++i){
int ti = i>>1;
cf[i] = (i&1)?-dc[ti][n-ti]:0;
}
reverse(cf+1,cf+k+1);
memset(a,0,(k+1)<<3),memset(b,0,(k+1)<<3);
memset(res,0,(k+1)<<3);
for(int i=1;i<=k;++i) a[k-i] = p-cf[i];
a[k] = b[1] = res[0] = 1;
int bt = 1,rt = 0;
ll tm = m;
while(1){
if(m&1){
multiply(res,b,rt,bt,res);
rt += bt;
if(rt>=k) mod(res,a,rt,k,res);
rt = min(rt,k-1);
}
m >>= 1;
if(m==0) break;
multiply(b,b,bt,bt,b);
bt <<= 1;
if(bt>=k) mod(b,a,bt<<1,k,b);
bt = min(bt,k-1);
}
memset(D,0,sizeof(D));
for(int i=0;i<k;++i)
for(int t=0;t<n;++t)
for(int j=0;j<n;++j)
D[t][j] = (D[t][j]+(ll)res[i]*F[i][t][j]%p+p)%p;
for(int i=0;i<n;++i){
if((i&1)!=(n&1)) 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;
for(int i=0;i<n;++i)
for(int j=i+1;j<n;++j){
if(B[i][j]==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(((__int128_t)n*tm/2)%2==1) ans = p-ans;
ans = (ans%p+p)%p;
printf("%d\n",ans);
}
return 0;
}
详细
Test #1:
score: 0
Time Limit Exceeded
input:
20000 3 695860418 1064851577 5 909984642 1024590071 2 702478034 1015656679 3 832070346 1020170803 3 931276816 1069777147 5 624464668 1019025517 4 563777828 1039054439 3 70355912 1062629389 2 538334151 1043751551 4 644616259 1051984399 2 565963832 1050482821 3 489913670 1030290631 5 625001688 6518147...
output:
889215569 670951730 483405543 355257897 563953115 524024279 815773299 734679810 266201944 156563661 556277524 188969274 607188444 210143750 108744246 7651374 636855097 493227881 66494941 541528569 232780855 220305284 157636415 735388230 99671148 863972210 540368496 249186290 797066419 1022449349 786...