#line 2 "header.hpp"

//%snippet.set('header')%
//%snippet.fold()%
#ifndef HEADER_H
#define HEADER_H

// template version 2.0
using namespace std;
#include <bits/stdc++.h>

// varibable settings
const long long INF = 1e18;
template <class T> constexpr T inf = numeric_limits<T>::max() / 2.1;

#define _overload3(_1, _2, _3, name, ...) name
#define _rep(i, n) repi(i, 0, n)
#define repi(i, a, b) for (ll i = (ll)(a); i < (ll)(b); ++i)
#define rep(...) _overload3(__VA_ARGS__, repi, _rep, )(__VA_ARGS__)
#define _rrep(i, n) rrepi(i, 0, n)
#define rrepi(i, a, b) for (ll i = (ll)((b)-1); i >= (ll)(a); --i)
#define r_rep(...) _overload3(__VA_ARGS__, rrepi, _rrep, )(__VA_ARGS__)
#define each(i, a) for (auto &&i : a)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define pb(a) push_back(a)
#define mp(a, b) make_pair(a, b)
#define mt(...) make_tuple(__VA_ARGS__)
#define ub upper_bound
#define lb lower_bound
#define lpos(A, x) (lower_bound(all(A), x) - A.begin())
#define upos(A, x) (upper_bound(all(A), x) - A.begin())
template <class T> inline void chmax(T &a, const T &b) { if ((a) < (b)) (a) = (b); }
template <class T> inline void chmin(T &a, const T &b) { if ((a) > (b)) (a) = (b); }
template <typename X, typename T> auto make_table(X x, T a) { return vector<T>(x, a); }
template <typename X, typename Y, typename Z, typename... Zs> auto make_table(X x, Y y, Z z, Zs... zs) { auto cont = make_table(y, z, zs...); return vector<decltype(cont)>(x, cont); }

#define cdiv(a, b) (((a) + (b)-1) / (b))
#define is_in(x, a, b) ((a) <= (x) && (x) < (b))
#define uni(x) sort(all(x)); x.erase(unique(all(x)), x.end())
#define slice(l, r) substr(l, r - l)

typedef long long ll;
typedef long double ld;
using vl = vector<ll>;
using vvl = vector<vl>;
using pll = pair<ll, ll>;

template <typename T>
using PQ = priority_queue<T, vector<T>, greater<T>>;
void check_input() { assert(cin.eof() == 0); int tmp; cin >> tmp; assert(cin.eof() == 1); }

#if defined(PCM) || defined(LOCAL)
#else
#define dump(...) ;
#define dump_1d(...) ;
#define dump_2d(...) ;
#define cerrendl ;
#endif

#endif /* HEADER_H */
//%snippet.end()%
#line 2 "solve.cpp"
template<class T=ll> using vec = vector<T>;
struct Fast { Fast() { std::cin.tie(0); ios::sync_with_stdio(false); } } fast;


int solve() {
    int n,v,sx,sy,gx,gy;cin>>n>>v>>sx>>sy>>gx>>gy;
    sx--;sy--;gx--;gy--;
    swap(sx, sy);
    swap(gx, gy);
    dump(n, v, sx, sy, gx, gy);

    vec<vec<int>> L = make_table(n, n, 0);
    rep(i, n)rep(j, n) cin>>L[i][j];

    chmin(v, 1784);

    auto d = make_table(n, n, 1784, inf<int>);
    d[sx][sy][v] = 0;
    queue<tuple<int, int, int>> q;
    q.push(mt(sx, sy, v));

    ll dx[]={1, -1, 0, 0};
    ll dy[]={0, 0, 1, -1};
    while (!q.empty()){
        auto [x, y, hp] = q.front();q.pop();
        // dump(x, y, hp);
        rep(dir, 4){
            int nx = x + dx[dir];
            int ny = y + dy[dir];
            if (0 <= nx && nx < n && 0<= ny && ny < n){
                int nhp = hp - L[nx][ny];
                if (nhp <= 0) continue;
                if (d[x][y][hp] + 1 < d[nx][ny][nhp]){
                    d[nx][ny][nhp] = d[x][y][hp] + 1;
                    if (nx == gx && ny == gy){
                        cout << d[nx][ny][hp] << endl;
                        return 0;
                    }
                    q.push(mt(nx, ny, nhp));
                }
            }
        }
    }
    cout << -1 << endl;

    return 0; 
}


int main(){/*{{{*/
    solve();
    check_input();
    return 0;
}/*}}}*/