#include "bits/stdc++.h"
using namespace std;

/* macro */
#define rep(i,a,b) for(int i=a;i<b;i++)
#define revrep(i,a,b) for(int i = a; i > b; i--)
//#define int long long 
#define exist(s,e) ((s).find(e)!=(s).end())
#define all(v) (v).begin(), (v).end()
#define each(s,itr) for(auto (itr) = s.begin(); (itr) != s.end(); (itr)++)
#define sum(v) accumulate(all(v), (0LL))
#define isin(a, b, c) (b <= a && a <= c)
#define println cout << "\n";
#define sz(v) (int)v.size()
#define bin(x) static_cast<bitset<16> >(x)



/* alias */
template<class T> using vec = vector<T>;
typedef vector<int> vi;
typedef pair<int, int> pi;
typedef tuple<int, int, int> ti;
typedef map<int, int> mi;
typedef set<int> si;


/* constant */
const int inf = 1 << 30;
const int mod = 1e9 + 7;
const int dx[8]={1,0,-1,0,-1,1,-1,1};
const int dy[8]={0,1,0,-1,-1,-1,1,1};
const string alphabet = "abcdefghijklmnopqrstuvwxyz";

/* io_method */
int input(){int tmp;cin >> tmp;return tmp;}
string raw_input(){string tmp;cin >> tmp;return tmp;}
template<class T> void printx(T n){cout << n;}
template<class T, class U> void printx(pair<T, U> p){cout << "(" << p.first << "," << p.second << ")";}
template<class T, class U, class V> void printx(tuple<T, U, V> t){cout << "{" << get<0>(t) << "," << get<1>(t) <<"," << get<2>(t) << "}" << endl;}
template<class T> void printx(vector<T> v){cout << "{";rep(i,0,v.size()){printx(v[i]);if(i != v.size()-1)printx(",");}cout << "}";}
template<class T> void print(T n){printx(n);cout << endl;}
template<class T> void print(set<T> s){cout << "{";each(s, e){if(e != s.begin()) printx(",");printx(*e);}cout << "}" << endl;}
template<class T, class U> void print(map<T, U> mp){cout << "{";each(mp, e){cout << "(" << e -> first << "," << e -> second << ")";}cout << "}" << endl;}
template<class T> void printans(vec<T> v){rep(i,0,sz(v)){cout << v[i] << (i == sz(v) - 1 ? "" : " ");}cout << endl;}


/* general_method */
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
template<class T>T cut(T &a, int l, int r){return T(a.begin()+l, a.begin()+r);}

/* main */

int n, v, sx, sy, gx, gy;
int arr[100][100];
void in(){
    cin >> n >> v >> sx >> sy >> gx >> gy;
    sx--; sy--; gx--; gy--;
    rep(i,0,n){
        rep(j,0,n){
            arr[i][j] = input();
        }
    }
}

void solve(){

    int dist[100][100][10001];
    rep(i,0,100) rep(j,0,100) rep(k,0,10001) dist[i][j][k] = inf;
    dist[sy][sx][v] = 0;

    queue<vi> que;
    que.push({0, sx, sy, v});

    while(not que.empty()){
        int d = que.front()[0];
        int x = que.front()[1];
        int y = que.front()[2];
        int v = que.front()[3];
        que.pop();

        if(dist[y][x][v] < d) continue;

        rep(i,0,4){
            int tx = x + dx[i];
            int ty = y + dy[i];
            if(!(isin(tx, 0, n - 1) && isin(ty, 0, n - 1))) continue;
            if(v - arr[ty][tx] <= 0) continue;

            if(chmin(dist[ty][tx][v - arr[ty][tx]], d + 1)){
                que.push({d + 1, tx, ty, v - arr[ty][tx]});
            }
        }
    }

    int ans = inf;
    rep(i,1,10001){
        chmin(ans, dist[gy][gx][i]);
    }
    print(ans);
    


}

signed main(){

    cin.tie(0);
    ios::sync_with_stdio(false);
    in();
    solve();
    
}