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#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
struct position{
int x;
int y;
};//new type
char kboard[50][50];
int r ,c;
int distance (position a,position b)//calculates position between two keys given 2 positions
{
return (abs(a.x-b.x)+abs(a.y-b.y));
}
///////////////////////////////////////////////////////////////////////////////////
bool search_letter (const char& c,int l,int k)//searches for a letter before the position given in argument l for x and k for y
{
if((l==0)&&(k==0)) return(0);
for (int i=0;i<=(l-1);i++)
{
for(int j=0;j<=c;j++)
{
if (kboard[i][j]==c)return(1);
}
}
for(int j=0;j<k;j++)
{
if (kboard[(l-1)][j]==c)return(1);
}
return(0);
}
////////////////////////////////////////////////////////////////////////////////////////////
bool ligible(const char& c,int k, int l)//returns 1 if the letter is ligible to be there
{
if(l==0)
if(kboard[k-1][0]==c) return (1);
else{return (0);
}
if(k==0)
if(kboard[0][l-1]==c) return (1);
else{return (0);
}
else{
if((kboard[k-1][l]==c)||(kboard[k][l-1]==c))return(1);
else{return(0);
}
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////
position next_position(position a){
position w;
if (a.y!=(c-1)){
w.y+=1;
}
else{
if (a.x!=(r-1)){
w.x+=1;
}
else{w.x=-1;
}
}
return(w);
}
/////////////////////////////////////////////////////////////////////////////////////////////////
position search_position(const char& c,position q)//search for a letter from a certain position to the end and returns the first adresse found ,if the letter is not found it returns a postion with x=-1
{
q=next_position(q);
if(q.x=-1)return(q);
for (int i=(q.x);i<r;i++)
{
for(int j=(q.y);j<c;j++){
if ((kboard[i][j])==c){
q.x=i;
q.y=j;
return(q);
}
}
}
q.x=-1;
return(q);
}
////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////main
int main(){
do {
cout<<"give the numbre of rows 0<r<51"<<endl;
cin>>r;
}while((r<1)||(r>50));
/////
do {
cout<<"give the numbre of colomns 0<c<51"<<endl;
cin>>c;
}while((c<1)||(c>50));
////////
char s ;
noasterisc :for (int i=0;i<r;i++)
{
for (int j=0;j<c;j++){
here :cout <<"enter the letter in the place : ("<<i<<","<<j<<")"<<endl;
cin>>s;
if (!(search_letter(s,i,j))) kboard[i][j]=s;
else{
if (ligible(s,i,j))kboard [i][j]=s;
else{
goto here;
}
}
}
}
if(!(search_letter('*',r,c))) {
cout<<"you didn't write the necessary asterisc *,rewrite the keyboard "<<endl;
goto noasterisc;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
char word[10001];
cout<<"enter a word "<<endl<<endl;
cin>>word;
int number_strokes=0,bestnbr=101,crnbr;
position pos1,pos2;
pos1.x=0;
pos1.y=0;
pos2=pos1;
pos2=search_position(word[0],pos2);
do {
crnbr=distance(pos1,pos2);
if (crnbr<bestnbr)bestnbr=crnbr;
pos2=search_position(word[0],pos2);
}while((pos2.x)!=-1);
numbre_strokes+=bestnbr;
bestnbr=101;
char c1,c2;
c1=word[0];
pos2=pos1;
for (int i=1;i<100001;i++){
if(word[i]=='\0')break;
else{
c2=word[i];
pos1=search_position(c1,pos1);
pos2=search_position(c2,pos2);
do {
do{
crnbr=distance(pos1,pos2);
if (crnbr<bestnbr)bestnbr=crnbr;
pos2=search_position(c2,pos2);
}while((pos2.x)!=-1);
pos1=search_position(c1,pos1);
}while((pos1.x)!=-1);
numbre_strokes+=bestnbr;
c1=c2;
pos1.x=0;
pos1.y=0;
pos2=pos1;
}
}
cout<<"The minimum numbre of strokes for the word entered is :"<<numbre_strokes<<endl;
system("PAUSE");
}
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