This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <stdio.h>
#include <vector>
#define INF 0x7fffffff
using namespace std;
typedef pair <int,int> ppair;
vector <ppair> A[250001];
int N, W, H, Ynext[501][501][4], Xnext[501][501][4], Yloc[10], Xloc[10];
int Ydir[4]={0,1,0,-1}, Xdir[4]={1,0,-1,0}, D[10][10][501][501], Ans=INF;
int Check[501][501][4];
char Room[501][502];
void DFS(int y, int x, int dir) {
int ty, tx, tdir=dir;
if(Check[y][x][dir])
return;
if(Room[y][x]=='A') {
tdir=dir-1;
if(tdir<0)
tdir=3;
}
else if(Room[y][x]=='C') {
tdir=dir+1;
tdir%=4;
}
ty=y+Ydir[tdir];
tx=x+Xdir[tdir];
if(!(ty>=1 && ty<=H && tx>=1 && tx<=W) || Room[ty][tx]=='x') {
Ynext[y][x][dir]=y;
Xnext[y][x][dir]=x;
}
else {
DFS(ty,tx,tdir);
Ynext[y][x][dir]=Ynext[ty][tx][tdir];
Xnext[y][x][dir]=Xnext[ty][tx][tdir];
}
Check[y][x][dir]=1;
}
void renew(int p, int q) {
int i, j, k, m, l=INF, r=0, y, x, ok;
for(i=1 ; i<=H ; i++)
for(j=1 ; j<=W ; j++)
if(D[p][q][i][j]!=INF) {
A[D[p][q][i][j]].push_back(make_pair(i,j));
if(l>D[p][q][i][j])
l=D[p][q][i][j];
if(r<D[p][q][i][j])
r=D[p][q][i][j];
}
for(i=l ; i<=r ; i++) {
k=A[i].size();
ok=0;
for(j=0 ; j<k ; j++) {
y=A[i][j].first;
x=A[i][j].second;
if(D[p][q][y][x]!=i)
continue;
for(m=0 ; m<=3 ; m++)
if(D[p][q][Ynext[y][x][m]][Xnext[y][x][m]]>i+1) {
D[p][q][Ynext[y][x][m]][Xnext[y][x][m]]=i+1;
A[i+1].push_back(make_pair(Ynext[y][x][m],Xnext[y][x][m]));
ok=1;
}
}
if(i==r && ok)
r++;
A[i].clear();
}
}
int main(void) {
int i, j, k, l, y, x, dir, py, px;
scanf("%d %d %d",&N,&W,&H);
for(i=1 ; i<=H ; i++) {
scanf("%s",&Room[i][1]);
for(j=1 ; j<=W ; j++)
if('1'<=Room[i][j] && Room[i][j]<='9') {
Yloc[Room[i][j]-'0']=i;
Xloc[Room[i][j]-'0']=j;
Room[i][j]='.';
}
}
for(i=1 ; i<=H ; i++)
for(j=1 ; j<=W ; j++)
if(Room[i][j]!='x')
for(k=0 ; k<=3 ; k++)
DFS(i,j,k);
for(k=1 ; k<=N ; k++) {
for(i=1 ; i<=H ; i++)
for(j=1 ; j<=W ; j++)
D[k][k][i][j]=INF;
D[k][k][Yloc[k]][Xloc[k]]=0;
renew(k,k);
}
for(i=1 ; i<=N-1 ; i++)
for(j=i+1 ; j<=N ; j++)
for(y=1 ; y<=H ; y++)
for(x=1 ; x<=W ; x++)
D[i][j][y][x]=INF;
for(l=1 ; l<=N-1 ; l++)
for(i=1 ; i<=N-l ; i++) {
j=i+l;
for(k=i ; k<=j-1 ; k++)
for(y=1 ; y<=H ; y++)
for(x=1 ; x<=W ; x++)
if(D[i][k][y][x]!=INF && D[k+1][j][y][x]!=INF && D[i][j][y][x]>D[i][k][y][x]+D[k+1][j][y][x])
D[i][j][y][x]=D[i][k][y][x]+D[k+1][j][y][x];
renew(i,j);
}
for(i=1 ; i<=H ; i++)
for(j=1 ; j<=W ; j++)
if(Ans>D[1][N][i][j])
Ans=D[1][N][i][j];
if(Ans==INF)
printf("-1");
else
printf("%d",Ans);
return 0;
}
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