Submission #1016268
Source Code Expand
#define DEB
#include<bits/stdc++.h>
#define REP(i,m) for(int i=0;i<(m);++i)
#define REPN(i,m,in) for(int i=(in);i<(m);++i)
#define ALL(t) (t).begin(),(t).end()
#define CLR(a) memset((a),0,sizeof(a))
#define pb push_back
#define mp make_pair
#define fr first
#define sc second
using namespace std;
#ifdef DEB
#define dump(x) cerr << #x << " = " << (x) << endl
#define prl cerr<<"called:"<< __LINE__<<endl
template<class T> void debug(T a,T b){ for(;a!=b;++a) cerr<<*a<<' ';cerr<<endl;}
#else
#define dump(x) ;
#define prl ;
template<class T> void debug(T a,T b){ ;}
#endif
template<class T> void chmin(T& a,const T& b) { if(a>b) a=b; }
template<class T> void chmax(T& a,const T& b) { if(a<b) a=b; }
typedef long long int lint;
typedef pair<int,int> pi;
namespace std{
template<class S,class T>
ostream &operator <<(ostream& out,const pair<S,T>& a){
out<<'('<<a.fr<<','<<a.sc<<')';
return out;
}
}
template<lint mod>
struct Int_{
unsigned x;
unsigned mpow(Int_ a,unsigned k){
Int_ res=1;
while(k){
if(k&1) res=res*a;
a=a*a;
k>>=1;
}
return res.x;
}
unsigned inverse(Int_ a){
return mpow(a,mod-2);
}
Int_(): x(0) { }
Int_(long long sig) {
int sigt=sig%mod;
if(sigt<0) sigt+=mod;
x=sigt;
}
unsigned get() const { return (unsigned)x; }
Int_ &operator+=(Int_ that) { if((x += that.x) >= mod) x -= mod; return *this; }
Int_ &operator-=(Int_ that) { if((x += mod - that.x) >= mod) x -= mod; return *this; }
Int_ &operator*=(Int_ that) { x = (unsigned long long)x * that.x % mod; return *this; }
Int_ &operator=(Int_ that) { x=that.x; return *this;}
Int_ &operator/=(Int_ that) { x=(unsigned long long) x * inverse(that.x)%mod; return *this;}
bool operator==(Int_ that) const { return x==that.x; }
bool operator!=(Int_ that) const { return x!=that.x; }
Int_ operator-() const { return Int_(0)-Int_(*this);}
Int_ operator+(Int_ that) const { return Int_(*this) += that; }
Int_ operator-(Int_ that) const { return Int_(*this) -= that; }
Int_ operator*(Int_ that) const { return Int_(*this) *= that; }
Int_ operator/(Int_ that) const { return Int_(*this) /= that; }
};
namespace std{
template<lint mod>
ostream &operator <<(ostream& out,const Int_<mod>& a){
out<<a.get();
return out;
}
template<lint mod>
istream &operator >>(istream& in,Int_<mod>& a){
in>>a.x;
return in;
}
};
typedef Int_<1000000007> Int;
//const int INF=5e8;
int h,w;
char buf[205][205];
struct uf{
static const int MAXN=405;;
int par[MAXN];
int size[MAXN];
void init(){
memset(par,-1,sizeof(par));
REP(i,MAXN) size[i]=1;
}
int root(int a){
if(par[a]==-1) return a;
return par[a]=root(par[a]);
}
void unite(int a,int b){
a=root(a);b=root(b);
if(a==b) return;
if(size[a]<size[b]) swap(a,b);
par[b]=a;
size[a]+=size[b];
}
bool same(int a,int b){
return root(a)==root(b);
}
};
uf u;
int deg[405];
int main(){
u.init();
cin>>h>>w;
REP(i,h) scanf("%s",buf[i]);
Int res=1;
if(h&1){
bool same=true;
REP(i,w) if(buf[h/2][i]!=buf[h/2][w-1-i]) same=false;
if(!same) res*=2;
}
if(w&1){
bool same=true;
REP(i,h) if(buf[i][w/2]!=buf[h-1-i][w/2]) same=false;
if(!same) res*=2;
}
Int fact[5];
fact[0]=1;
REP(i,4) fact[i+1]=fact[i]*(i+1);
int K=h/2,L=w/2;
REP(i,h/2) REP(j,w/2){
int ys[]={i,h-1-i},xs[]={j,w-1-j};
map<char,int> cs;
REP(k,2) REP(l,2) cs[buf[ys[k]][xs[l]]]++;
dump(cs.size());
if(cs.size()<4){
Int tmp=fact[4];
for(auto e:cs) tmp/=fact[e.sc];
res*=tmp;
}
if(cs.size()==4){
u.unite(i,j+K);
u.unite(j+K,j);
++deg[i];
++deg[j+K];
res*=fact[3]*2;
}
}
REP(i,K+L) if(deg[i]>0 && u.root(i)!=i) res*=2;
cout<<res<<endl;
return 0;
}
Submission Info
Submission Time
2016-12-08 23:46:01+0900
Task
I - Reverse Grid
User
hogloid
Language
C++14 (GCC 5.4.1)
Score
1900
Code Size
4016 Byte
Status
AC
Exec Time
61 ms
Memory
256 KB
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:130:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
REP(i,h) scanf("%s",buf[i]);
^
Judge Result
Set Name
sample
all
Score / Max Score
0 / 0
1900 / 1900
Status
Set Name
Test Cases
sample
sample-01.txt, sample-02.txt
all
sample-01.txt, sample-02.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt, 01-11.txt, 01-12.txt, 01-13.txt, 01-14.txt, 01-15.txt, 01-16.txt, 01-17.txt, 01-18.txt, 01-19.txt, 01-20.txt, 01-21.txt, 01-22.txt, 01-23.txt, 01-24.txt, 01-25.txt, 01-26.txt, 01-27.txt, 01-28.txt, 01-29.txt, 01-30.txt, 01-31.txt, 01-32.txt, 01-33.txt, 01-34.txt, 01-35.txt
Case Name
Status
Exec Time
Memory
01-01.txt
AC
3 ms
256 KB
01-02.txt
AC
3 ms
256 KB
01-03.txt
AC
3 ms
256 KB
01-04.txt
AC
3 ms
256 KB
01-05.txt
AC
3 ms
256 KB
01-06.txt
AC
3 ms
256 KB
01-07.txt
AC
2 ms
256 KB
01-08.txt
AC
3 ms
256 KB
01-09.txt
AC
3 ms
256 KB
01-10.txt
AC
57 ms
256 KB
01-11.txt
AC
57 ms
256 KB
01-12.txt
AC
58 ms
256 KB
01-13.txt
AC
56 ms
256 KB
01-14.txt
AC
14 ms
256 KB
01-15.txt
AC
16 ms
256 KB
01-16.txt
AC
59 ms
256 KB
01-17.txt
AC
58 ms
256 KB
01-18.txt
AC
59 ms
256 KB
01-19.txt
AC
60 ms
256 KB
01-20.txt
AC
59 ms
256 KB
01-21.txt
AC
61 ms
256 KB
01-22.txt
AC
4 ms
256 KB
01-23.txt
AC
31 ms
256 KB
01-24.txt
AC
58 ms
256 KB
01-25.txt
AC
58 ms
256 KB
01-26.txt
AC
59 ms
256 KB
01-27.txt
AC
5 ms
256 KB
01-28.txt
AC
11 ms
256 KB
01-29.txt
AC
3 ms
256 KB
01-30.txt
AC
13 ms
256 KB
01-31.txt
AC
58 ms
256 KB
01-32.txt
AC
57 ms
256 KB
01-33.txt
AC
58 ms
256 KB
01-34.txt
AC
59 ms
256 KB
01-35.txt
AC
59 ms
256 KB
sample-01.txt
AC
3 ms
256 KB
sample-02.txt
AC
3 ms
256 KB