#include <string>
#include <vector>
#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<stack>
#include<queue>
#include<cmath>
#include<algorithm>
#include<functional>
#include<list>
#include<deque>
#include<bitset>
#include<set>
#include<map>
#include<unordered_map>
#include<unordered_set>
#include<cstring>
#include<sstream>
#include<complex>
#include<iomanip>
#include<numeric>
#include<cassert>
#define X first
#define Y second
#define pb push_back
#define rep(X,Y) for (int (X) = 0;(X) < (Y);++(X))
#define reps(X,S,Y) for (int (X) = S;(X) < (Y);++(X))
#define rrep(X,Y) for (int (X) = (Y)-1;(X) >=0;--(X))
#define rreps(X,S,Y) for (int (X) = (Y)-1;(X) >= (S);--(X))
#define repe(X,Y) for ((X) = 0;(X) < (Y);++(X))
#define peat(X,Y) for (;(X) < (Y);++(X))
#define all(X) (X).begin(),(X).end()
#define rall(X) (X).rbegin(),(X).rend()
#define eb emplace_back
#define UNIQUE(X) (X).erase(unique(all(X)),(X).end())
#define Endl endl

using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
template<class T> using vv=vector<vector<T>>;
template<class T> ostream& operator<<(ostream &os, const vector<T> &t) {
os<<"{"; rep(i,t.size()) {os<<t[i]<<",";} os<<"}"<<endl; return os;}
template<class T,size_t n> ostream& operator<<(ostream &os, const array<T,n> &t) {
	os<<"{"; rep(i,n) {os<<t[i]<<",";} os<<"}"<<endl; return os;}
template<class S, class T> ostream& operator<<(ostream &os, const pair<S,T> &t) { return os<<"("<<t.first<<","<<t.second<<")";}
template<class S, class T,class U> ostream& operator<<(ostream &os, const tuple<S,T,U> &t) { return os<<"("<<get<0>(t)<<","<<get<1>(t)<<","<<get<2>(t)<<")";}
template<class S, class T,class U,class V> ostream& operator<<(ostream &os, const tuple<S,T,U,V> &t) { return os<<"("<<get<0>(t)<<","<<get<1>(t)<<","<<get<2>(t)<<","<<get<3>(t)<<")";}
template<class T> inline bool MX(T &l,const T &r){return l<r?l=r,1:0;}
template<class T> inline bool MN(T &l,const T &r){return l>r?l=r,1:0;}
//#undef _DEBUG
#ifdef _DEBUG
#define out(args...){vector<string> a_r_g_s=s_p_l_i_t(#args, ','); e_r_r(a_r_g_s.begin(), args); }
vector<string> s_p_l_i_t(const string &s, char c){vector<string> v;int d=0,f=0;string t;for(char c:s){if(!d&&c==',')v.pb(t),t="";else t+=c;if(c=='\"'||c=='\'')f^=1;if(!f&&c=='(')++d;if(!f&&c==')')--d;}v.pb(t);return move(v);}
void e_r_r(vector<string>::iterator it) {}
template<typename T, typename... Args> void e_r_r(vector<string>::iterator it, T a, Args... args){ if(*it==" 1"||*it=="1") cerr<<endl; else cerr << it -> substr((*it)[0] == ' ', it -> length()) << " = " << a << ", "; e_r_r(++it, args...);}
#else
#define out
#endif
template<typename T>vector<T> table(int n, T v){ return vector<T>(n, v);}
template <class... Args> auto table(int n, Args... args){auto val = table(args...); return vector<decltype(val)>(n, move(val));}
const ll MOD=1e9+7;

int sum[2123][2123];
int sum_[2123][2123];
int suml[2123][2123];

inline int Sum(int sum[2123][2123],int x,int y,int X,int Y){
	return sum[Y][X]+sum[y][x]-sum[y][X]-sum[Y][x];
}

char mp[2123][2123];
int x[212345];
int y[212345];
int X[212345];
int Y[212345];

int main(){
  ios_base::sync_with_stdio(false);
  cout<<fixed<<setprecision(0);
	int n,m,q;
	cin>>n>>m>>q;
	rep(i,n) cin>>mp[i];
	rep(i,n)rep(j,m)if(mp[i][j]=='1'){
		sum[i+1][j+1]=1;
		if(i) suml[i+1][j+1]=(mp[i-1][j]=='1');
		if(j) sum_[i+1][j+1]=(mp[i][j-1]=='1');
	}
	rep(i,n+4)rep(j,m+4){
		sum[i][j+1]+=sum[i][j];
		suml[i][j+1]+=suml[i][j];
		sum_[i][j+1]+=sum_[i][j];
	}
	rep(i,n+4)rep(j,m+4){
		sum[i+1][j]+=sum[i][j];
		suml[i+1][j]+=suml[i][j];
		sum_[i+1][j]+=sum_[i][j];
	}

	rep(i,q) cin>>y[i]>>x[i]>>Y[i]>>X[i], --y[i], --x[i];
	rep(i,q){
		cout<<Sum(sum,x[i],y[i],X[i],Y[i])-Sum(sum_,x[i]+1,y[i],X[i],Y[i])
		-Sum(suml,x[i],y[i]+1,X[i],Y[i])<<"\n";
	}
  return 0;
}


Measured memory_bytes: 61312