#include <cstdio>
using namespace std;
struct celula
{
    int x;
    int y;
};
int dx[4]={-1,0,1,0},dy[4]={0,1,0,-1},n,m,curent,mat[155][155];
bool a[155][155],Q[23500];
int i,n1,sol,j;
celula b[23500];
bool verificare(int x,int y)
{
    if(x>=1 && x<=n) if (y>=1 && y<=m && a[x][y]==0) return true;
    return false;
}
void Lee()
{
    bool OK=0;
    for(i=1;i<=n1;i++) for(j=0;j<4;j++) if (Q[mat[b[i].x+dx[j]][b[i].y+dy[j]]] && verificare(b[i].x+dx[j],b[i].y+dy[j]))
        {
            sol++;
            OK=1;
            b[++n1].x=b[i].x+dx[j];
            b[n1].y=b[i].y+dy[j];
            a[b[n1].x][b[n1].y]=1;
            Q[(b[n1].x-1)*m+b[n1].y]=1;
            OK=1;
        }
    if(OK==1) Lee();
}
int main()
{
    freopen("castel.in","r",stdin);
    freopen("castel.out","w",stdout);
    scanf("%d %d %d\n",&n,&m,&curent);
    for(i=1;i<=n;i++) for(j=1;j<=m;j++) scanf("%d",&mat[i][j]);
    b[1].x=(curent-1)/m+1;
    b[1].y=(curent-1)%m+1;
    n1=sol=1;
    Q[curent]=1;
    a[b[1].x][b[1].y]=1;
    Lee();
    printf("%d\n",sol);
}