#include <iostream>
#include <fstream>
using namespace std;
ifstream fin ("castel.in");
ofstream fout ("castel.out");
#define NR_DIR 4
struct cell {
    int l;
    int c;
};
cell coada[23500];
int dl[4] = {0, -1, 0, 1};
int dc[4] = {-1, 0, 1, 0};
bool chei[23500], drum[152][152];
int castel[152][152];
int cntr, sol, n, m;
void lee () {
    int i, j, lvec, cvec;
    bool iesi = false;
    for (i = 0; i < cntr; i++) {
        for (j = 0; j < NR_DIR; j++) {
            lvec = coada[i].l + dl[j];
            cvec = coada[i].c + dc[j];
            if (castel[lvec][cvec] != -1 && chei[castel[lvec][cvec]] && drum[lvec][cvec] == 0) {
                drum[lvec][cvec] = 1;
                coada[cntr].l = lvec;
                coada[cntr++].c = cvec;
                sol++;
                chei[(lvec - 1) * m + cvec] = 1;
                iesi = true;
            }
        }
    }
    if (iesi == true) {
        lee();
    }
}
int main()
{
    int pozS;
    int i, j;
    fin >> n >> m >> pozS;
    for (i = 1; i <= n; i++) {
        for (j = 1; j <= m; j++) {
            fin >> castel[i][j];
        }
    }
    for (i = 0; i <= n + 1; i++) {
        castel[i][0] = castel[i][m + 1] = -1;
    }
    for (i = 0; i <= m + 1; i++) {
        castel[0][i] = castel[n + 1][i] = -1;
    coada[cntr].l = ((pozS - 1) / m) + 1;
    coada[cntr].c = (pozS - 1) % m + 1;
    chei[castel[coada[cntr].l][coada[cntr].c]] = 1;
    cntr++;
    lee ();
    fout << sol;

    return 0;
}