#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <iostream>
#include <istream>
#include <iterator>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>
#include <tuple>
#include <iomanip>
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
//typedef pair<ll, ll> P;
typedef vector<ll> vec;
typedef vector<vec> mat;
#define rep(i, n) for(ll i = 0; i < (n); i++)
#define revrep(i, n) for(ll i = (n)-1; i >= 0; i--)
#define pb push_back
#define f first
#define s second

ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll max3(ll a, ll b, ll c){return max(a, max(b, c));};
ll min3(ll a, ll b, ll c){return min(a, min(b, c));};
ll max4(ll a, ll b, ll c, ll d){return max(max(a, b), min(c, d));};
ll min4(ll a, ll b, ll c, ll d){return min(min(a, b), min(c, d));};
ll max5(ll a, ll b, ll c, ll d, ll e){return max(max(a, b), max3(c, d, e));};
ll min5(ll a, ll b, ll c, ll d, ll e){return min(min(a, b), min3(c, d, e));};

const ll INFL = 1LL << 60;//10^18 = 2^60
const int INF = 1 << 30;//10^9
//ll MOD = 1000000007;
ll MOD = 998244353;

vector<ll> dy = {0, 0, 1, -1, 1, 1, -1, -1, 0};
vector<ll> dx = {1, -1, 0, 0, 1, -1, 1, -1, 0};

//デバッグ
void BinarySay(ll x, ll y = 60){rep(i, y) cout << (x>>(y-1-i) & 1); cout << endl;}

ll pow_long(ll x, ll k){
  ll res = 1;
  while(k > 0){
    if(k % 2) res *= x;
    x *= x;
    k /= 2;
  }
  return res;
}
ll pow_mod(ll x, ll k){
  ll res = 1;
  while(k > 0){
    if(k % 2){
      res *= x; res %= MOD;
    }
    x *= x; x %= MOD;
    k /= 2;
  }
  return res;
}

ll inverse(ll x){return pow_mod(x, MOD - 2);};

ll gcd(ll a, ll b){
    if(b == 0) return a;
    return gcd(b, a % b);
}

ll lcm(ll x, ll y){return x / gcd(x, y) * y;};


ll kai_mod(ll x){
  if(x == 0) return 1;
  return x * kai_mod(x-1) % MOD;
}

//コンビネーション
const int MAXcomb = 200010;
ll fac[MAXcomb], finv[MAXcomb], inv[MAXcomb];
//facはn!,finvは1/n!
//invは逆元
void COMinit(){
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    inv[1] = 1;
    for(int i = 2; i < MAXcomb; i++){
        fac[i] = fac[i-1] * i % MOD;
        inv[i] = MOD - inv[MOD%i] * (MOD/i) % MOD;
        finv[i] = finv[i-1] * inv[i] % MOD;
    }
}
ll comb(int n, int k){
    if(n < k) return 0;
    if(n < 0 || k < 0) return 0;
    return fac[n] * finv[k] % MOD * finv[n-k] % MOD;
}

ll N, M, Q;
char mp[2010][2010];
ll cntV[2010][2010];
ll cntEU[2010][2010];
ll cntER[2010][2010];
void solve(){
  rep(i, N)rep(j, M){
    cntV[i+1][j+1] = cntV[i+1][j] + cntV[i][j+1] - cntV[i][j] + (mp[i][j] == '1');
  }
  rep(i, N)rep(j, M){
    ll p = 0;
    if(i != 0) p += (mp[i][j] == '1' && mp[i-1][j] == '1');
    cntEU[i+1][j+1] = cntEU[i+1][j] + cntEU[i][j+1] - cntEU[i][j] + p;
  }
  rep(i, N)rep(j, M){
    ll p = 0;
    if(j != 0) p += (mp[i][j] == '1' && mp[i][j-1] == '1');
    cntER[i+1][j+1] = cntER[i+1][j] + cntER[i][j+1] - cntER[i][j] + p;
  }
  vector<ll> ans(Q);
  rep(i, Q){
    ll y1, x1, y2, x2;
    cin >> y1 >> x1 >> y2 >> x2;
    ll V = cntV[y2][x2] - cntV[y2][x1-1] - cntV[y1-1][x2] + cntV[y1-1][x1-1];
    ll E = cntEU[y2][x2] - cntEU[y2][x1-1] - cntEU[y1][x2] + cntEU[y1][x1-1];
    E += cntER[y2][x2] - cntER[y2][x1] - cntER[y1-1][x2] + cntER[y1-1][x1];

    ans[i] = V - E;
  }
  rep(i, Q){
    cout << ans[i] << endl;
  }
}
int main(){
  cin >> N >> M >> Q;
  rep(i, N)rep(j, M) cin >> mp[i][j];
  solve();
}


Measured memory_bytes: 103680