Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
typedef long long ll;
int main(void) {
  int n, a, b;
  cin >> n >> a >> b;
  vector<int> x(ll);
  cin >> x[0];
  ll ans = 0;
  for (int i = 1; i < n; i++) {
    cin >> x[i];
    ans += min((x[i] - x[i - 1]) * a, b);
  }
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:13: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   10 |   cin >> x[0];
      |             ^
a.cc:10:7: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'std::vector<int>(ll)' {aka 'std::vector<int>(long long int)'})
   10 |   cin >> x[0];
      |   ~~~ ^~ ~~~~
      |   |         |
      |   |         std::vector<int>(ll) {aka std::vector<int>(long long int)}
      |   std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/iostream:42,
                 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:10:13: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'}
   10 |   cin >> x[0];
      |          ~~~^
/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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'short int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(short int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'short unsigned int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(short unsigned int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'unsigned int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(unsigned int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'long int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(long int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'long unsigned int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(long unsigned int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'long long int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(long long int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'long long unsigned int' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(long long unsigned int)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'void*' [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
a.cc:10:13: error: cannot bind rvalue '(void*)x' 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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka std::vector<int> (*)(long long int)}
/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:10:13: error: invalid conversion from 'std::vector<int> (*)(ll)' {aka 'std::vector<int> (*)(long long int)'} to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'} [-fpermissive]
   10 |   cin >> x[0];
      |          ~~~^
      |             |
      |             std::vector<int> (*)(ll) {aka st