Language: C++

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

#define endl "\n"
#define f first
#define s second
#define pb push_back
#define pii pair<int,int>
#define pll pair<ll,ll>
#define ll long long
#define faster ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

const ll M = 998244353;
const int N = 1005;
const int K = 3000;
const ll INF = 1e18;
const double EPS = 1e-6;

ll n,m,q;
ll a[N][N],c[N][N],r[N][N],cnt[N][N],x1,x2,y1,y2;
char w;

int main () {
	faster
	cin>>n>>m>>q;
	for (int i = 1; i<=n; i++) {
		for (int j = 1; j<=m; j++) {
			cin>>w;
			a[i][j] = (w == '1');
		}
	}
	for (int i = 1; i<=n; i++) {
		for (int j = 1; j<=m; j++) {
			c[i][j] = c[i-1][j] + c[i][j-1] - c[i-1][j-1] + (a[i][j] == a[i][j-1] && a[i][j] == 1);
			r[i][j] = r[i-1][j] + r[i][j-1] - r[i-1][j-1] + (a[i][j] == a[i-1][j] && a[i][j] == 1);
			cnt[i][j] = cnt[i-1][j] + cnt[i][j-1] - cnt[i-1][j-1] + a[i][j];
		}
	}
	for (int i = 1; i<=q; i++) {
		cin>>x1>>y1>>x2>>y2;
		ll ans = 0;
		ans += cnt[x2][y2] - cnt[x2][y1-1] - cnt[x1-1][y2] + cnt[x1-1][y1-1];
		ans -= c[x2][y2] - c[x2][y1] - c[x1-1][y2] + c[x1-1][y1];
		ans -= r[x2][y2] - r[x1][y2] - r[x2][y1-1] + r[x1][y1-1];
		cout<<ans<<endl;
	}

    return 0;
}

Compiler output:
a.cc:20:44: error: 'long long int y1' redeclared as different kind of entity
   20 | ll a[N][N],c[N][N],r[N][N],cnt[N][N],x1,x2,y1,y2;
      |                                            ^~
In file included from /usr/include/features.h:523,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/c++config.h:683,
                 from /usr/include/c++/14/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:33,
                 from a.cc:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:257:1: note: previous declaration 'double y1(double)'
  257 | __MATHCALL (y1,, (_Mdouble_));
      | ^~~~~~~~~~
a.cc: In function 'int main()':
a.cc:40:24: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'double(double) noexcept')
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                 ~~~~~~~^~~~
      |                    |     |
      |                    |     double(double) noexcept
      |                    std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'double (*)(double) noexcept'
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'short int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(short int)y1' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'short unsigned int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(short unsigned int)y1' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(int)y1' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'unsigned int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(unsigned int)y1' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(long int)y1' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long unsigned int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(long unsigned int)y1' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long long int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(long long int)y1' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long long unsigned int' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(long long unsigned int)y1' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'void*' [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:40:26: error: cannot bind rvalue '(void*)y1' to 'void*&'
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:7: note:   conversion of argument 1 would be ill-formed:
a.cc:40:26: error: invalid conversion from 'double (*)(double) noexcept' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   40 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_typ