Language: C++

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <vector>
#include <iomanip>
#define ALL(x) (x).begin(), (x).end()
#define dll(x) scanf("%I64d",&x)
#define xll(x) printf("%I64d\n",x)
#define sz(a) int(a.size())
#define all(a) a.begin(), a.end()
#define rep(i,x,n) for(int i=x;i<n;i++)
#define repd(i,x,n) for(int i=x;i<=n;i++)
#define pii pair<int,int>
#define pll pair<long long ,long long>
#define gbtb ios::sync_with_stdio(false),cin.tie(0),cout.tie(0)
#define MS0(X) memset((X), 0, sizeof((X)))
#define MSC0(X) memset((X), '\0', sizeof((X)))
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define eps 1e-6
#define gg(x) getInt(&x)
#define db(x) cout<<"== [ "<<x<<" ] =="<<endl;
using namespace std;
typedef long long ll;
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
ll lcm(ll a,ll b){return a/gcd(a,b)*b;}
ll powmod(ll a,ll b,ll MOD){ll ans=1ll;while(b){if(b&1)ans=ans*a%MOD;a=a*a%MOD;b>>=1;}return ans;}
inline void getInt(int* p);
const int maxn=1000010;
const int inf=0x3f3f3f3f;
/*** TEMPLATE CODE * * STARTS HERE ***/
const int N=2003;
struct node
{
	int hang;
	int lie;
	int v;
}dp[N][N];
char a[N][N];
int n,m,q;
int x1,x2,y1,y2;
int main()
{
	//    freopen("C:\\Users\\DH_M\\Desktop\\code_io\\in.txt.txt","r",stdin);
	//    freopen("C:\\Users\\DH_M\\Desktop\\code_io\\out.txt.txt","w",stdout);
	gbtb;
	cin>>n>>m>>q;
	repd(i,1,n)
	{
		repd(j,1,m)
		{
			cin>>a[i][j];
		}
	}
	repd(i,1,n)
	{
		repd(j,1,m)
		{
			dp[i][j].v=dp[i][j-1].v+dp[i-1][j].v-dp[i-1][j-1].v+(a[i][j]=='1'?1:0);
			dp[i][j].lie=dp[i][j-1].lie+dp[i-1][j].lie-dp[i-1][j-1].lie;
			dp[i][j].hang=dp[i][j-1].hang+dp[i-1][j].hang-dp[i-1][j-1].hang;

			if(a[i][j]=='1')
			{
				if(a[i][j]==a[i-1][j])
				{
					dp[i][j].lie++;
				}
				if(a[i][j]==a[i][j-1])
                {
                    dp[i][j].hang++;
//                    num++;
                }
			}

		}
	}
	repd(qq,1,q)
	{
		cin>>x1>>y1>>x2>>y2;
		int cnt=dp[x2][y2].v-dp[x2][y1-1].v-dp[x1-1][y2].v+dp[x1-1][y1-1].v;
		cnt-=dp[x2][y2].hang-dp[x2][y1].hang-dp[x1-1][y2].hang+dp[x1-1][y1].hang;
		cnt-=dp[x2][y2].lie-dp[x1][y2].lie-dp[x2][y1-1].lie+dp[x1][y1-1].lie;
		cout<<cnt<<endl;
	}


    return 0;
}

inline void getInt(int* p) {char ch;do {ch = getchar();}
while (ch == ' ' || ch == '\n');if (ch == '-') {*p = -(getchar() - '0');
while ((ch = getchar()) >= '0' && ch <= '9') {*p = *p * 10 - ch + '0';}}
else {*p = ch - '0';while ((ch = getchar()) >= '0' && ch <= '9')
{*p = *p * 10 + ch - '0';}}}


Compiler output:
a.cc:49:11: error: 'int y1' redeclared as different kind of entity
   49 | int 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/bits/requires_hosted.h:31,
                 from /usr/include/c++/14/iostream:38,
                 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:88:24: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'double(double) noexcept')
   88 |                 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/iostream:42:
/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:88:26: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'double (*)(double) noexcept'
   88 |                 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'short int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'short unsigned int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'unsigned int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long unsigned int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long long int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'long long unsigned int' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: error: invalid conversion from 'double (*)(double) noexcept' to 'void*' [-fpermissive]
   88 |                 cin>>x1>>y1>>x2>>y2;
      |                          ^~
      |                          |
      |                          double (*)(double) noexcept
a.cc:88:26: 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:88:26: 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]
   88 |                 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_type = std::basic_istream<char>; __ios_type = std::basic_ios<char>]' (near match)
  126 |       operator>>(__ios_type& (*__pf)(__ios_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:126:7: note:   conversion of argument 1 would be ill-formed:
a.cc:88:26: error: