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

class UnionFind{
    public:
    vector<int> par,siz;
    vector<set<int>> Query;

    void make(int N,vector<pair<int,int>> Q){
        par.resize(N,-1);
        siz.resize(N,1);
        Query.resize(N);
        for(int i=0; i<Q.size(); i++){
            auto[a,b] = Q.at(i);
            Query.at(a).insert(i);
            Query.at(b).insert(i);
        }
    }
 
    int root(int x){
        if(par.at(x) == -1) return x;
        else return par.at(x) = root(par.at(x));
    }
 
    vector<int> unite(int u, int v){
        u = root(u),v = root(v);
        if(u == v) return {};
        if(Query.at(u).size() < Query.at(v).size()) swap(u,v);

        par.at(v) = u;
        siz.at(u) += siz.at(v);
        vector<int> ret;
        for(auto &pos : Query.at(v)){
            if(Query.at(u).count(pos)){ret.push_back(pos),Query.at(u).erase(pos);}
            else Query.at(u).insert(pos);
        }
        Query.at(v).clear();
        return ret;
    }
 
    bool issame(int u, int v){
        if(root(u) == root(v)) return true;
        else return false;
    }
};

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int H,W; cin >> H >> W;
    vector<vector<int>> rev(1000000);
    vector<vector<int>> A(H,vector<int>(W));
    for(int i=0; i<H; i++) for(int k=0; k<W; k++){
        int a; cin >> a; A.at(i).at(k) = a;
        rev.at(a).push_back(i*W+k);
    }

    int Q; cin >> Q;
    vector<int> answer(Q);
    vector<pair<int,int>> Query;
    while(Q--){
        int x1,y1,x2,y2; cin >> x1 >> y1 >> x2 >> y2;
        x1--; y1--; x2--; y2--;
        Query.push_back({x1*W+y1,x2*W+y2});
    }
    Q = answer.size();
    UnionFind Z; Z.make(H*W,Query);
    
    vector<pair<int,int>> dxy = {{-1,0},{0,1},{1,0},{0,-1}};
    for(int i=0; i<1000000; i++) for(auto r : rev.at(i)){
        int x = r/W,y = r%W;
        for(auto [dx,dy] : dxy){
            int nx = x+dx,ny = y+dy;
            if(nx < 0 || ny < 0 || nx >= H || ny >= W) continue;
            if(A.at(nx).at(ny) <= A.at(x).at(y)){
                auto now = Z.unite(x*W+y,nx*W+ny);
                for(auto pos : now) answer.at(pos) = i;
            }
        }
    }

    for(auto ans : answer) cout << ans << "\n";
}