#include <iostream>
#include <fstream>
#define LMAX 23000
using namespace std;
ifstream f ("castel.in");
ofstream g ("castel.out");
int n,m,i,j,nr,q,a[155][155],v[LMAX],lin,col,inc,sf,k,dl[4]={-1,0,1,0},dc[4]={0,1,0,-1};
struct num
{
    int l,c;
}C[LMAX],coada[LMAX],x,y;
void del(int x,int &k)
{
    int i;
    for (i=x;i<k;i++)
    {
        coada[i].l=coada[i+1].l;
        coada[i].c=coada[i+1].c;
    }
    k--;
}
int main()
{
    f>>n>>m>>q;
    for (i=1;i<=n;i++)
        for (j=1;j<=m;j++)
            f>>a[i][j];
    v[q]=1;
    lin=q/m+1;
    col=(q-1)%m+1;
    a[lin][col]=0;
    C[0].l=lin;
    C[0].c=col;
    while (inc<=sf)
    {
        while (inc<=sf)
        {
            x=C[inc++];
            for (i=0;i<4;i++)
            {
                y.l=x.l+dl[i];
                y.c=x.c+dc[i];
                if (v[a[y.l][y.c]]==1)
                {
                    nr=(y.l-1)*m+(y.c-1)%m+1;
                    v[nr]=1;
                    a[y.l][y.c]=0;
                    C[++sf]=y;
                }
                else if (a[y.l][y.c]!=0)
                {
                    coada[++k]=y;
                    //a[y.l][y.c]=0;
                }
            }
        }
        for (i=1;i<=k;i++)
        {
            y=coada[i];
            if (v[a[y.l][y.c]]==1)
            {
                nr=(y.l-1)*m+(y.c-1)%m+1;
                v[nr]=1;
                a[y.l][y.c]=0;
                C[++sf]=y;
                del(i,k);
                i--;
            }
        }
    }
    g<<sf+1;
    return 0;
}