// >>> TEMPLATES
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using i32 = int32_t;
using i64 = int64_t;
#define int ll
#define double ld
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)
#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)
#define loop(i,a,B) for (int i = a; i B; i++)
#define loopR(i,a,B) for (int i = a; i B; i--)
#define all(x) (x).begin(), (x).end()
#define allR(x) (x).rbegin(), (x).rend()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second
auto constexpr INF32 = numeric_limits<int32_t>::max()/2-1;
auto constexpr INF64 = numeric_limits<int64_t>::max()/2-1;
auto constexpr INF   = numeric_limits<int>::max()/2-1;
#ifdef LOCAL
#include "debug.hpp"
#define dump(...) cerr << "[" << setw(3) << __LINE__ << ":" << __FUNCTION__ << "] ", dump_impl(#__VA_ARGS__, __VA_ARGS__)
#define say(x) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] " << x << endl
#define debug if (1)
#else
#define dump(...) (void)(0)
#define say(x) (void)(0)
#define debug if (0)
#endif
template <class T> using pque_max = priority_queue<T>;
template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
template <class F> struct FixPoint : private F {
    constexpr FixPoint(F&& f) : F(forward<F>(f)) {}
    template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }
};
struct MakeFixPoint {
    template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }
};
#define MFP MakeFixPoint()|
#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)
template <class T, size_t d> struct vec_impl {
    using type = vector<typename vec_impl<T,d-1>::type>;
    template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }
};
template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;
template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
template <class T, class U> constexpr bool chmin(T& x, U const& y) { if (x > y) { x = y; return true; } return false; }
template <class T, class U> constexpr bool chmax(T& x, U const& y) { if (x < y) { x = y; return true; } return false; }
template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
template <class T> int sz(T const& x) { return x.size(); }
template <class C, class T> int lbd(C const& v, T const& x) {
    return lower_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class T> int ubd(C const& v, T const& x) {
    return upper_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class F> int ppt(C const& v, F f) {
    return partition_point(v.begin(), v.end(), f)-v.begin();
}
// <<<

// >>> Sum2D
template <class T>
struct Sum2D {
    vector<vector<T>> v;
    bool built = true;
    Sum2D(int nx, int ny) : v(nx+1, vector<T>(ny+1, 0)) {}
    int xsize() const { return v.size()-1; };
    int ysize() const { return v[0].size()-1; }
    void add(int x, int y, T const& z) {
        assert(0 <= x); assert(x < xsize());
        assert(0 <= y); assert(y < ysize());
        built = false;
        v[x+1][y+1] += z;
    }
    void build() {
        rep (i,xsize()+1) rep (j,ysize()) v[i][j+1] += v[i][j];
        rep (i,xsize()) rep (j,ysize()+1) v[i+1][j] += v[i][j];
        built = true;
    }
    T get(int lx, int ly, int rx, int ry) const {
        assert(built);
        assert(0 <= lx); assert(lx <= rx); assert(rx <= xsize());
        assert(0 <= ly); assert(ly <= ry); assert(ry <= ysize());
        return v[rx][ry] - v[rx][ly] - v[lx][ry] + v[lx][ly];
    }
};
// <<<

int32_t main() {
    int n,m,q; cin >> n >> m >> q;
    vector<string> s(n); cin >> s;

    Sum2D<int> v(n,m), ex(n-1,m), ey(n,m-1);
    rep (i,v.xsize()) rep (j,v.ysize()) {
        v.add(i,j,s[i][j] == '1');
    }
    rep (i,ex.xsize()) rep (j,ex.ysize()) {
        ex.add(i,j,s[i][j] == '1' && s[i+1][j] == '1');
    }
    rep (i,ey.xsize()) rep (j,ey.ysize()) {
        ey.add(i,j,s[i][j] == '1' && s[i][j+1] == '1');
    }
    v.build();
    ex.build();
    ey.build();

    rep (i,q) {
        int x1,y1,x2,y2; cin >> x1 >> y1 >> x2 >> y2;
        --x1, --y1;

        dump(x1,y1,x2,y2);
        int nv = v.get(x1,y1,x2,y2);
        int nx = ex.get(x1,y1,x2-1,y2);
        int ny = ey.get(x1,y1,x2,y2-1);
        dump(nv,nx,ny);

        cout << nv-nx-ny << "\n";

    }

}


Measured memory_bytes: 100096