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#include <iostream>
#include <queue>
using namespace std;

int main()
{
    int a,b;
    cin>>a>>b;
    int mat[a][b];
    bool poseten[a][b];
    queue<int>Q;
    for(int i=0;i<a;i++)
    {
        for(int j=0;j<b;j++)
        {
            cin>>mat[i][j];
            poseten[i][j]=false;
        }
    }
    int kolku=0;
    int di[] = {-1, 1, 0, 0};
    int dj[] = {0, 0, -1, 1};
    
    for(int k=0;k<=a*b;k++)
    {
        int najmal=40;
        int r=0,c=0;
        for(int i=0;i<a;i++)
        {
            for(int j=0;j<b;j++)
            {
                if(najmal>mat[i][j] && poseten[i][j]!=true)
                {
                    najmal=mat[i][j];
                    r=i;
                    c=j;
                }
            }
        }

if(najmal!=40)
        {
            poseten[r][c]=true;
            Q.push(r);
            Q.push(c);
            kolku++;
            while(!Q.empty())
            {
                int ci=Q.front();
                Q.pop();
                int cj=Q.front();
                Q.pop();
                for(int o = 0; o < 4; o++) {
                    int ti = ci + di[o];
                    int tj = cj + dj[o];
                    if(ti >= 0 and ti < a and tj >= 0 and tj < b and !poseten[ti][tj] and mat[ti][tj] >= mat[ci][cj]) {
                        poseten[ti][tj] = true;
                        Q.push(ti);
                        Q.push(tj);
                    }
                }
            }
        }
    }
    cout<<kolku;
    return 0;
}