Zid

#include <fstream>
#define NMAX 300
#define CMAX 12

using namespace std;
ifstream fin("zid.in");
ofstream fout("zid.out");
int n, m, c;
int Lmax, imax, jmax;
int Z[NMAX][NMAX];
int F[NMAX][NMAX][CMAX];
int uz[CMAX];

int main()
{int i, j, k, ii, jj, L, cate;
 ///citire
 fin>>n>>m>>c;
 for (i=1; i<=n; i++)
     for (j=1; j<=m; j++) fin>>Z[i][j];
 ///determinarea tabloului de frecvente
 /// F[i][j][x]=numarul de aparitii ale literei x in zona cu coltul stanga sus (1,1) si coltul dreapta-jos (i,j).
 for (i=1; i<=n; i++)
     for (j=1; j<=m; j++)
           for (k=0; k<=c; k++) F[i][j][k]=F[i-1][j][k]+F[i][j-1][k]-F[i-1][j-1][k]+(Z[i][j]==k);
 ///determinat patrat colorat uniform de arie maxima

 for (i=1; i<=n; i++)
     for (j=1; j<=m; j++)
         for (L=min(n-i+1, m-j+1); L>Lmax; L--)
             {
              ii=i+L-1; jj=j+L-1;
              for (k=0; k<=c; k++) uz[k]=F[ii][jj][k]-F[ii][j-1][k]-F[i-1][jj][k]+F[i-1][j-1][k];
              for (k=0; !uz[k]; k++);
              cate=uz[k];
              for (; k<=c; k++)
                  if (uz[k] && uz[k]!=cate) break;
              if (k==c+1) ///patrat colorat uniform
                  {if (L>Lmax) {Lmax=L; imax=i; jmax=j;}
                   break;}
             }
 fout<<Lmax*Lmax<<' '<<imax<<' '<<jmax<<'\n';
 fout.close();
 return 0;
}