FourSquare1

#include <bits/stdc++.h>
using namespace std;
ifstream fin("foursquare1.in");
ofstream fout("foursquare1.out");
char a1[6][6],a2[6][6],a3[6][6],a4[6][6],s[10001],ans[10001];
struct index
{
     int x,y;

};

struct index findIndex(char mat[6][6],char ch)
{
       struct index f;
       for(int i=0;i<5;++i)
       {
              for(int j=0;j<5;++j)
              {
                     if(mat[i][j]==ch)
                     {
                           f.x=i;
                           f.y=j;
                           break;
                     }
              }
       }
       return f;
}

void encrypt(int l)
{

       int ax,ay,bx,by;
       struct index f;
       for(int i=0;i<l;i=i+2)
       {
              f=findIndex(a2,s[i]);
              ax=f.x;
              ay=f.y;
              f=findIndex(a3,s[i+1]);
              bx=f.x;
              by=f.y;
              ans[i]=a1[ax][by];
              ans[i+1]=a4[bx][ay];
              fout<<ans[i]<<ans[i+1];
       }
}

int main()
{
    for(int i=0;i<5;++i)
        fin>>a1[i];
    fin.get();
    for(int i=0;i<5;++i)
        fin>>a2[i];
    fin.get();
    for(int i=0;i<5;++i)
        fin>>a3[i];
    fin.get();
    for(int i=0;i<5;++i)
        fin>>a4[i];
    fin.get();
    fin.getline(s,10001);
    unsigned int ls=strlen(s);
    encrypt(ls);
    return  0;
}