Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(){
    long long int a,b,c,d;
    cin>>a>>b>>c>>d;
    int x=c;
    c=min(x,d);
    d=max(x,d);

    int c2,d2;
    c2=c;
    d2=d;
    int r =  d2%c2;
    while(r!=0){
    d2 = c2;
    c2 = r;
    r = d2 % c2;
    }
    int lcm=c*d/c2;

    int c1,d1,cd;
    for(int i=a;i<b+1;i++){
        if(i%c==0)c1++;
        if(i%d==0)d1++;
        if(i%lcm==0)cd++;
    }

    cout<<c1+d1-cd<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:10: error: no matching function for call to 'min(int&, long long int&)'
    9 |     c=min(x,d);
      |       ~~~^~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:9:10: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
    9 |     c=min(x,d);
      |       ~~~^~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:9:10: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
    9 |     c=min(x,d);
      |       ~~~^~~~~
a.cc:10:10: error: no matching function for call to 'max(int&, long long int&)'
   10 |     d=max(x,d);
      |       ~~~^~~~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:10:10: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   10 |     d=max(x,d);
      |       ~~~^~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:10:10: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   10 |     d=max(x,d);
      |       ~~~^~~~~