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 <iostream>
#include <map>
#include <bitset>
using namespace std;
char g[10][10];
int n,m;
int ind(int i,int j)
{
return (i*(m-1))+j;
}
int val(char c)
{
return ((c=='+')?1:-1);
}
map<string,bool> posp;
void backtrack(int i,int j)
{
if(i==n and j==0)
{
string s;
for(int i=0;i<n;i++){
for(int j=0;j<m;j++)
{
s+=g[i][j];
}
}
posp[s]=1;
return;
}
// if(i>=n or j>=m or i<0 or j<0)
// return;
if(g[i][j]=='?')
{
for(char a:{'+','-'})
{
g[i][j]=a;
if(i>0 and j>0)
{
int su=val(g[i][j-1])+val(g[i][j])+val(g[i-1][j])+val(g[i-1][j-1]);
if(su!=0)
{
continue;
}
}
if((j==(m-1)))
{
backtrack(i+1,0);
}
else
{
backtrack(i,j+1);
}
}
g[i][j]='?';
}
else
{
if(i>0 and j>0)
{
int su=val(g[i][j-1])+val(g[i][j])+val(g[i-1][j])+val(g[i-1][j-1]);
if(su!=0)
{
return;
}
}
if((j==(m-1)))
{
backtrack(i+1,0);
}
else
{
backtrack(i,j+1);
}
}
}
int main()
{
cin.tie(0);
cout.tie(0);
ios::sync_with_stdio(0);
int k;
cin>>n>>m>>k;
for(int i=0;i<n;i++)
for(int j=0;j<m;j++)
g[i][j]='?';
for(int j=0;j<k;j++)
{
char c;
cin>>c;
int x,y;
cin>>x>>y;
x--;y--;
g[x][y]=c;
}
backtrack(0,0);
cout<<posp.size()<<endl;
return 0;
}
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