//Lib
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<cmath>
#include<ctime>
#include<iostream>
#include<algorithm>
#include<vector>
#include<string>
#include<queue>
#include<set>
#include<map>
using namespace std;
//Macro
#define rep(i,a,b) for(int i=a,tt=b;i<=tt;++i)
#define drep(i,a,b) for(int i=a,tt=b;i>=tt;--i)
#define erep(i,e,x) for(int i=x;i;i=e[i].next)
#define irep(i,x) for(__typeof(x.begin()) i=x.begin();i!=x.end();i++)
#define read() (strtol(ipos,&ipos,10))
#define sqr(x) ((x)*(x))
#define pb push_back
#define PS system("pause");
typedef long long ll;
typedef pair<int,int> pii;
const int oo=~0U>>2;
const double inf=1e100;
const double eps=1e-6;
string name="", in=".in", out=".out";
//Var
struct MonoQueue
{
deque<pii> s;
void clear(){s.clear();}
void Insert(int x,int y)
{
while(!s.empty()&&s.back().second<y)s.pop_back();
s.push_back(pii(x,y));
}
int Get(int time,int limit)
{
while(!s.empty()&&time-s.front().first>limit)s.pop_front();
return s.front().second;
}
}Q;
struct S
{
int st,t,dir;
bool operator <(const S &o)const{return st<o.st;}
}seg[208];
int f[2][208][208];
bool forbid[208][208];
int n,m,X,Y,K,ans;
void Init()
{
scanf("%d%d%d%d%d",&n,&m,&X,&Y,&K);
char ch;
rep(i,1,n)rep(j,1,m)
{
cin>>ch;forbid[i][j]=ch=='x';
f[0][i][j]=-oo;
}
f[0][X][Y]=0;
rep(i,1,K)
scanf("%d%d%d",&seg[i].st,&seg[i].t,&seg[i].dir),seg[i].t-=seg[i].st-1;
sort(seg+1,seg+1+K);
}
void Update(int time,int now,int x,int y,int k)
{
if(forbid[x][y]){f[now][x][y]=-oo;Q.clear();return;}
Q.Insert(time,f[now^1][x][y]-time);
f[now][x][y]=Q.Get(time,seg[k].t)+time;
ans=max(ans,f[now][x][y]);
}
void Work()
{
int now=0;
rep(i,1,K)
{
now^=1;
if(seg[i].dir==1)
rep(y,1,m)
{
Q.clear();
drep(x,n,1)
Update(n-x,now,x,y,i);
}
else if(seg[i].dir==2)
rep(y,1,m)
{
Q.clear();
rep(x,1,n)
Update(x-1,now,x,y,i);
}
else if(seg[i].dir==3)
rep(x,1,n)
{
Q.clear();
drep(y,m,1)
Update(m-y,now,x,y,i);
}
else
rep(x,1,n)
{
Q.clear();
rep(y,1,m)
Update(y-1,now,x,y,i);
}
}
cout<<ans<<endl;
}
int main()
{
// freopen((name+in).c_str(),"r",stdin);
// freopen((name+out).c_str(),"w",stdout);
Init();
Work();
return 0;
}
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