Language: C++

#include<bits/stdc++.h>
using namespace std;
#define N 100010
#define ll long long
int main()
{
    int N,M;
    cin>>N,M;
    cout << N * (N - 1) / 2 + M * (M - 1) / 2 << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:3:11: error: expected unqualified-id before numeric constant
    3 | #define N 100010
      |           ^~~~~~
a.cc:7:9: note: in expansion of macro 'N'
    7 |     int N,M;
      |         ^
a.cc:8:8: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'int')
    8 |     cin>>N,M;
      |     ~~~^~
      |     |
      |     std::istream {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,
                 from a.cc:1:
/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:3:11: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: warning: overflow in conversion from 'int' to 'short int' changes value from '100010' to '-31062' [-Woverflow]
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
a.cc:3:11: error: cannot bind non-const lvalue reference of type 'short int&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: warning: unsigned conversion from 'int' to 'short unsigned int' changes value from '100010' to '34474' [-Woverflow]
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
a.cc:3:11: error: cannot bind non-const lvalue reference of type 'short unsigned int&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: error: cannot bind non-const lvalue reference of type 'int&' to an rvalue of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: error: cannot bind non-const lvalue reference of type 'unsigned int&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: error: cannot bind non-const lvalue reference of type 'long int&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: error: cannot bind non-const lvalue reference of type 'long unsigned int&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: error: cannot bind non-const lvalue reference of type 'long long int&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: error: cannot bind non-const lvalue reference of type 'long long unsigned int&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/usr/include/c++/14/istream:219:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:7: note:   conversion of argument 1 would be ill-formed:
a.cc:3:11: error: cannot bind non-const lvalue reference of type 'float&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/usr/include/c++/14/istream:223:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:7: note:   conversion of argument 1 would be ill-formed:
a.cc:3:11: error: cannot bind non-const lvalue reference of type 'double&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/usr/include/c++/14/istream:227:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  227 |       operator>>(long double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:227:7: note:   conversion of argument 1 would be ill-formed:
a.cc:3:11: error: cannot bind non-const lvalue reference of type 'long double&' to a value of type 'int'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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:3:11: error: invalid conversion from 'int' to 'void*' [-fpermissive]
    3 | #define N 100010
      |           ^~~~~~
      |           |
      |           int
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
a.cc:3:11: error: cannot bind rvalue '(void*)100010' to 'void*&'
    3 | #define N 100010
      |           ^~~~~~
a.cc:8:10: note: in expansion of macro 'N'
    8 |     cin>>N,M;
      |          ^
/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