Language: C++

#include <iostream>
#include <math.h>
#include <vector>
#include <utility>
 
using namespace std;
 
bool DFSUtil(int, vector<bool>);
 
int main(){
  int R, C;
  cin >> R >> C;
  int N;
  cin >> N;
  vector<pair<int, int>> g;
  
  for(int i = 0; i < N; i++){
    int r, c, a;
    cin >> r >> c >> a;
    g[r].push_back(make_pair( c + C, a);
    g[c + C].push_back(make_pair(r, a));
  }
 
  vector<bool> visited(R + C, false);
  vector<int> node(R + C, 0);
  int minR, minC = pow(10,9);
  if(!DFSUtil(0, visited)){
    cout << "No";
  }
  else{
    cout >> "Yes";
  }
}
 
bool DFSUtil(int v, vector<bool> visited){
  visited[v] = true;
  for(int i = 0; i < g[v].size(); i++){
    int w = g[v][i]. first;
    int a = g[v][i].second;
    if(visited[w] && node[v] + node[w] != a){
      return false;
    }
    node[w] = a - node[v];
 
    if(v < R) minR = minR >node[v] ? node[v] : minR;
    if(v >= R) minC = minC>node[v] ? node[v] : minC;
    if(minR + minC < 0) return false;
    if(!visited[w]){
      if(!DFSUtil(w, visited)) return false;
    }
  }
  return true;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:10: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> >, std::pair<int, int> >::value_type' {aka 'struct std::pair<int, int>'} has no member named 'push_back'
   20 |     g[r].push_back(make_pair( c + C, a);
      |          ^~~~~~~~~
a.cc:20:40: error: expected ')' before ';' token
   20 |     g[r].push_back(make_pair( c + C, a);
      |                   ~                    ^
      |                                        )
a.cc:21:14: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> >, std::pair<int, int> >::value_type' {aka 'struct std::pair<int, int>'} has no member named 'push_back'
   21 |     g[c + C].push_back(make_pair(r, a));
      |              ^~~~~~~~~
a.cc:31:10: error: no match for 'operator>>' (operand types are 'std::ostream' {aka 'std::basic_ostream<char>'} and 'const char [4]')
   31 |     cout >> "Yes";
      |     ~~~~ ^~ ~~~~~
      |     |       |
      |     |       const char [4]
      |     std::ostream {aka std::basic_ostream<char>}
In file included from /usr/include/c++/14/string:55,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.tcc:835:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
  835 |     operator>>(basic_istream<_CharT, _Traits>& __in,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.tcc:835:5: note:   template argument deduction/substitution failed:
a.cc:31:13: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::basic_istream<_CharT, _Traits>'
   31 |     cout >> "Yes";
      |             ^~~~~
In file included from /usr/include/c++/14/bits/memory_resource.h:38,
                 from /usr/include/c++/14/string:68:
/usr/include/c++/14/cstddef:131:5: note: candidate: 'template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator>>(byte, _IntegerType)'
  131 |     operator>>(byte __b, _IntegerType __shift) noexcept
      |     ^~~~~~~~
/usr/include/c++/14/cstddef:131:5: note:   template argument deduction/substitution failed:
a.cc:31:5: note:   cannot convert 'std::cout' (type 'std::ostream' {aka 'std::basic_ostream<char>'}) to type 'std::byte'
   31 |     cout >> "Yes";
      |     ^~~~
In file included from /usr/include/c++/14/istream:1109,
                 from /usr/include/c++/14/iostream:42:
/usr/include/c++/14/bits/istream.tcc:978:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT&)'
  978 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
      |     ^~~~~~~~
/usr/include/c++/14/bits/istream.tcc:978:5: note:   template argument deduction/substitution failed:
a.cc:31:13: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::basic_istream<_CharT, _Traits>'
   31 |     cout >> "Yes";
      |             ^~~~~
/usr/include/c++/14/istream:849:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char&)'
  849 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
      |     ^~~~~~~~
/usr/include/c++/14/istream:849:5: note:   template argument deduction/substitution failed:
a.cc:31:13: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::basic_istream<char, _Traits>'
   31 |     cout >> "Yes";
      |             ^~~~~
/usr/include/c++/14/istream:854:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char&)'
  854 |     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
      |     ^~~~~~~~
/usr/include/c++/14/istream:854:5: note:   template argument deduction/substitution failed:
a.cc:31:13: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::basic_istream<char, _Traits>'
   31 |     cout >> "Yes";
      |             ^~~~~
/usr/include/c++/14/istream:896:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT*)'
  896 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
      |     ^~~~~~~~
/usr/include/c++/14/istream:896:5: note:   template argument deduction/substitution failed:
a.cc:31:13: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::basic_istream<_CharT, _Traits>'
   31 |     cout >> "Yes";
      |             ^~~~~
/usr/include/c++/14/istream:939:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char*)'
  939 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
      |     ^~~~~~~~
/usr/include/c++/14/istream:939:5: note:   template argument deduction/substitution failed:
a.cc:31:13: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::basic_istream<char, _Traits>'
   31 |     cout >> "Yes";
      |             ^~~~~
/usr/include/c++/14/istream:945:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char*)'
  945 |     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
      |     ^~~~~~~~
/usr/include/c++/14/istream:945:5: note:   template argument deduction/substitution failed:
a.cc:31:13: note:   'std::ostream' {aka 'std::basic_ostream<char>'} is not derived from 'std::basic_istream<char, _Traits>'
   31 |     cout >> "Yes";
      |             ^~~~~
/usr/include/c++/14/istream:1099:5: note: candidate: 'template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)'
 1099 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
/usr/include/c++/14/istream:1099:5: note:   template argument deduction/substitution failed:
/usr/include/c++/14/istream: In substitution of 'template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream<char>&; _Tp = const char (&)[4]]':
a.cc:31:13:   required from here
   31 |     cout >> "Yes";
      |             ^~~~~
/usr/include/c++/14/istream:1099:5: error: no type named 'type' in 'struct std::enable_if<false, void>'
 1099 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
a.cc: In function 'bool DFSUtil(int, std::vector<bool>)':
a.cc:37:22: error: 'g' was not declared in this scope
   37 |   for(int i = 0; i < g[v].size(); i++){
      |                      ^
a.cc:40:22: error: 'node' was not declared in this scope
   40 |     if(visited[w] && node[v] + node[w] != a){
      |                      ^~~~
a.cc:43:5: error: 'node' was not declared in this scope
   43 |     node[w] = a - node[v];
      |     ^~~~
a.cc:45:12: error: 'R' was not declared in this scope
   45 |     if(v < R) minR = minR >node[v] ? node[v] : minR;
      |            ^
a.cc:45:15: error: 'minR' was not declared in this scope
   45 |     if(v < R) minR = minR >node[v] ? node[v] : minR;
      |               ^~~~
a.cc:46:13: error: 'R' was not declared in this scope
   46 |     if(v >= R) minC = minC>node[v] ? node[v] : minC;
      |             ^
a.cc:46:16: error: 'minC' was not declared in this scope
   46 |     if(v >= R) minC = minC>node[v] ? node[v] : minC;
      |                ^~~~
a.cc:47:8: error: 'minR' was not declared in this scope
   47 |     if(minR + minC < 0) return false;
      |        ^~~~
a.cc:47:15: error: 'minC' was not declared in this scope
   47 |     if(minR + minC < 0) return false;
      |               ^~~~