OJ-Problems-Source/HDOJ/1067_autoAC.cpp

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2016-08-12 10:16:11 +08:00
#include<stdio.h>
#include<iostream>
#include<algorithm>
#include<string.h>
#include<queue>
#define ll __int64
#define MAX 1000009
using namespace std;
ll has[1000009];
ll b[4][8],op[32];
ll endval,start;
struct lmx{
ll arr[4][8];
ll val;
ll step;
ll blankx[4];
ll blanky[4];
};
ll a[4][8]=
{
{11,12,13,14,15,16,17},
{21,22,23,24,25,26,27},
{31,32,33,34,35,36,37},
{41,42,43,44,45,46,47}
};
ll _cnt(ll c[][8])
{
ll s=0,i,j;
for(i=0;i<4;i++)
{
for(j=0;j<8;j++)
{
s+=c[i][j]*op[8*i+j];
}
}
return s;
}
void exchange(ll c[][8])
{
ll i,j;
for(i=0;i<4;i++)
{
for(j=1;j<8;j++)
{
if(c[i][j]==11) swap(c[0][0],c[i][j]);
else if(c[i][j]==21) swap(c[1][0],c[i][j]);
else if(c[i][j]==31) swap(c[2][0],c[i][j]);
else if(c[i][j]==41) swap(c[3][0],c[i][j]);
}
}
}
bool ihash(ll val)
{
ll p=val%MAX;
while(has[p]!=-1&&has[p]!=val)
{
p=(p+20)%MAX;
}
if(has[p]==-1){has[p]=val;return true;}
return false;
}
void input()
{
int i,j;
for(i=0;i<4;i++)
{
for(j=1;j<8;j++)
{
scanf("%I64d",&b[i][j]);
}
b[i][0]=0;
}
}
lmx s,h,t;
queue<lmx> q;
ll bfs()
{
ll i,j,cnt=0,k,f=0,v,pos1,pos2,xx,yy;
if(start==endval) return 0;
while(!q.empty()) q.pop();
for(i=0;i<4;i++)
{
for(j=0;j<8;j++)
{
if(b[i][j]==0) {s.blankx[cnt]=i;s.blanky[cnt]=j;cnt++;}
}
}
memcpy(s.arr,b,sizeof(b));
s.step=0;
s.val=_cnt(b);
has[s.val%MAX]=s.val;
q.push(s);
while(!q.empty())
{
h=q.front();
q.pop();
for(i=0;i<4;i++)
{
t=h;
xx=h.blankx[i];
yy=h.blanky[i];
for(j=0;j<4;j++)
{
for(k=0;k<8;k++)
{
if(h.arr[xx][yy-1]+1==h.arr[j][k])
{
pos1=j;pos2=k;
swap(t.arr[pos1][pos2],t.arr[xx][yy]);
v=_cnt(t.arr);
t.blankx[i]=pos1;
t.blanky[i]=pos2;
if(ihash(v))
{
t.step=h.step+1;
t.val=v;
if(v==endval) return t.step;
q.push(t);
}
}
}
}
}
}
return -1;
}
int main()
{
ll i,j,n;
scanf("%I64d",&n);
op[0]=2;
for(i=1;i<32;i++) op[i]=op[i-1]<<1;
while(n--)
{
input();
exchange(b);
endval=_cnt(a);
start=_cnt(b);
memset(has,-1,sizeof(has));
printf("%I64d\n",bfs());
}
return 0;
}