Language: C++

// Example program
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i = a; i < b; i++)
typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> ii;
typedef vector<ii> vii;


int main() {
    int n,m;
    cin >> n >> m;
    string s;
    cin >> s.size();
    int flag = 1;
    if(s.size() != n+m+1) {
        flag = 0;
    } else {
        if(s[n] != '-') flag = 0;
        else {
            rep(i,0,s.size()) {
                if(i == n) continue;
                int num = s[i]-'0';
                if(num < 0 || num > 9) flag = 0;
            }    
        }
    }
    if(flag) cout << "YES" << endl;
    else cout << "NO" << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:9: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'})
   15 |     cin >> s.size();
      |     ~~~ ^~ ~~~~~~~~
      |     |            |
      |     |            std::__cxx11::basic_string<char>::size_type {aka long unsigned int}
      |     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:2:
/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:15:18: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'short int&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'short unsigned int&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'int&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'unsigned int&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'long int&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'long unsigned int&' to an rvalue of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'long long int&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'long long unsigned int&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'float&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'double&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: cannot bind non-const lvalue reference of type 'long double&' to a value of type 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'}
   15 |     cin >> s.size();
      |            ~~~~~~^~
/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:15:18: error: invalid conversion from 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} to 'void*' [-fpermissive]
   15 |     cin >> s.size();
      |            ~~~~~~^~
      |                  |
      |                  std::__cxx11::basic_string<char>::size_type {aka long unsigned int}
a.cc:15:18: error: cannot bind rvalue '(void*)s.std::__cxx11::basic_string<char>::size()' 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:15:18: error: invalid conversion from 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   15 |     cin >> s.size();
      |            ~~~~~~^~
      |                  |