#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using VI = vector<int>;
using VL = vector<ll>;
using VS = vector<string>;
template<class T> using PQ = priority_queue<T, vector<T>, greater<T>>;
#define FOR(i,a,n) for(int i=(a);i<(n);++i)
#define eFOR(i,a,n) for(int i=(a);i<=(n);++i)
#define rFOR(i,a,n) for(int i=(n)-1;i>=(a);--i)
#define erFOR(i,a,n) for(int i=(n);i>=(a);--i)
#define each(i, a) for(auto &i : a)
#define SORT(a) sort(a.begin(),a.end())
#define rSORT(a) sort(a.rbegin(),a.rend())
#define fSORT(a,f) sort(a.begin(),a.end(),f)
#define all(a) a.begin(),a.end()
#define out(y,x) ((y)<0||h<=(y)||(x)<0||w<=(x))
#define tp(a,i) get<i>(a)
#define line cout << "-----------------------------\n" 
#define ENDL(i,n) ((i) == (n) - 1 ? "\n" : " ")
#define stop system("pause")
constexpr ll INF = 1000000000;
constexpr ll LLINF = 1LL << 60;
constexpr ll mod = 1000000007;
constexpr ll MOD = 998244353;
constexpr ld eps = 1e-10;
constexpr ld pi = 3.1415926535897932;
template<class T>inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; }return false; }
template<class T>inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; }return false; }
inline void init() { cin.tie(nullptr); cout.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); }
template<class T>inline istream& operator>>(istream& is, vector<T>& v) { for (auto& a : v)is >> a; return is; }
template<class T>inline istream& operator>>(istream& is, deque<T>& v) { for (auto& a : v)is >> a; return is; }
template<class T, class U>inline istream& operator>>(istream& is, pair<T, U>& p) { is >> p.first >> p.second; return is; }
template<class T>inline vector<T> vec(size_t a) { return vector<T>(a); }
template<class T>inline vector<T> defvec(T def, size_t a) { return vector<T>(a, def); }
template<class T, class... Ts>inline auto vec(size_t a, Ts... ts) { return vector<decltype(vec<T>(ts...))>(a, vec<T>(ts...)); }
template<class T, class... Ts>inline auto defvec(T def, size_t a, Ts... ts) { return vector<decltype(defvec<T>(def, ts...))>(a, defvec<T>(def, ts...)); }
template<class T>inline void print(const T& a) { cout << a << "\n"; }
template<class T, class... Ts>inline void print(const T& a, const Ts&... ts) { cout << a << " "; print(ts...); }
template<class T>inline void print(const vector<T>& v) { for (int i = 0; i < v.size(); ++i)cout << v[i] << (i == v.size() - 1 ? "\n" : " "); }
template<class T>inline void print(const vector<vector<T>>& v) { for (auto& a : v)print(a); }
inline string reversed(const string& s) { string t = s; reverse(all(t)); return t; }

template<class T> class acc2d {
    int h, w;
    vector<vector<T>> dat;
public:
    acc2d(int _h, int _w) :h(_h), w(_w) {
        dat = vec<T>(h, w);
    };
    acc2d(vector<vector<T>>& _dat) : dat(_dat), h(_dat.size()), w(_dat[0].size()) {
        build();
    }
    void build() {
        FOR(i, 0, h)FOR(j, 1, w)dat[i][j] += dat[i][j - 1];
        FOR(i, 1, h)FOR(j, 0, w)dat[i][j] += dat[i - 1][j];
    }
    T sum(int y1, int x1, int y2, int x2) {
        T ret = dat[y2][x2];
        if (0 < y1)ret -= dat[y1 - 1][x2];
        if (0 < x1)ret -= dat[y2][x1 - 1];
        if (0 < y1 && 0 < x1)ret += dat[y1 - 1][x1 - 1];
        return ret;
    }
    T sum(int y2, int x2) { return sum(0, 0, y2, x2); }
    vector<T>& operator[](int i) { return dat[i]; }
};

int main() {
    init();

    int n, m, q; cin >> n >> m >> q;
    VS s(n); cin >> s;

    acc2d<int> v(n * 2, m * 2), e(n * 2, m * 2);
    FOR(i, 0, n)FOR(j, 0, m) {
        if (s[i][j] == '1') {
            ++v[i * 2][j * 2];
            if (i < n - 1 && s[i + 1][j] == '1')++e[i * 2 + 1][j * 2];
            if (j < m - 1 && s[i][j + 1] == '1')++e[i * 2][j * 2 + 1];
        }
    }
    v.build(), e.build();

    while (q--) {
        int sy, sx, gy, gx; cin >> sy >> sx >> gy >> gx;
        sy = (sy - 1) * 2, sx = (sx - 1) * 2;
        gy = (gy - 1) * 2, gx = (gx - 1) * 2;
        print(v.sum(sy, sx, gy, gx) - e.sum(sy, sx, gy, gx));
    }

    return 0;
}

Measured memory_bytes: 132804