#include <fstream>
#define mod 20000
#define Mod 200
#define INF 0x7fffffff
#define pune_in_coada(xx,yy) coada[0][(++dr)%mod] = xx, coada[1][dr%mod] = yy;
#define pune_in_alta_coada(keie,xx,yy) ramas[keie][(D[keie]++)%Mod].x = xx,ramas[keie][(D[keie])%Mod].y = yy
#define pune_dintr_o_coada_in_alta(keie) coada[0][++dr] = ramas[keie][(S[keie])%Mod].x, coada[1][dr] = ramas[keie][(S[keie]++)%Mod].y

using namespace std;

ifstream f("castel.in");
ofstream g("castel.out");

int n, m, i, j, k, a[151][151], xi, yi;
int b[151][151];
bool cheie[22555];
struct
{
    int x, y;
}ramas[152][Mod];
int S[152], D[152];
int dx[] = {-1, 0, 1, 0}, dy[] = {0, 1, 0, -1};

bool inauntru(int x, int y)
{
    return (x >= 1 && x <= n && y >= 1 && y <= m);
}

void cauta()
{
    int coada[2][mod], st = 0, dr = 0;
    int x, y, xx, yy;
    coada[0][st] = xi, coada[1][st] = yi;
    b[xi][yi] = 0;
    cheie[(xi-1)*m+yi] = 1;
    while (st <= dr)
    {
        x = coada[0][st%mod], y = coada[1][st%mod];
        for (i = 0; i < 4; i++)
        {
            xx = x+dx[i], yy = y+dy[i];
            if (inauntru(xx, yy))
            {
                if (cheie[a[xx][yy]] == 1 && b[xx][yy] > b[x][y]+1)
                {
                    pune_in_coada(xx,yy);
                    b[xx][yy] = b[x][y]+1;
                    cheie[(xx-1)*m + yy] = 1;
                    while (S[a[xx][yy]] <= D[a[xx][yy]])
                        pune_dintr_o_coada_in_alta(a[xx][yy]);
                }
                else;
                    pune_in_alta_coada(a[xx][yy], xx, yy);
            }
        }
        st++;
    }
}

int main()
{
    f >> n >> m >> k;
    xi = k/m+(k%m>0), yi = k%m;
    for (i = 1; i <= n; i++)
        for (j = 1; j <= m; j++)
            f >> a[i][j], b[i][j] = INF;
    cauta();
    int cnt = 0;
    for (i = 1; i <= n; i++)
        for (j = 1; j <= m; j++)
            if (b[i][j] != INF)
                cnt++;
    g << cnt;
    return 0;
}