Language: C++

#include<bits/stdc++.h>

using namespace std;

int64_t l, r, ans = 2019;

int main()
{
    cin >> l >> r;
    for (int64_t i=l; i<=min(r, l + 2LL*2019); i++)
    {
        for (int64_t j=i+1; j<=min(r, l + 2LL*2019); j++)
        {
            ans = min(ans, (i*j)%2019);
            if (ans==0) break;
        }
        if (ans==0) break;
    }
    cout << ans;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:29: error: no matching function for call to 'min(int64_t&, long long int)'
   10 |     for (int64_t i=l; i<=min(r, l + 2LL*2019); i++)
      |                          ~~~^~~~~~~~~~~~~~~~~
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:10:29: note:   deduced conflicting types for parameter 'const _Tp' ('long int' and 'long long int')
   10 |     for (int64_t i=l; i<=min(r, l + 2LL*2019); i++)
      |                          ~~~^~~~~~~~~~~~~~~~~
/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:10:29: note:   mismatched types 'std::initializer_list<_Tp>' and 'long int'
   10 |     for (int64_t i=l; i<=min(r, l + 2LL*2019); i++)
      |                          ~~~^~~~~~~~~~~~~~~~~
a.cc:12:35: error: no matching function for call to 'min(int64_t&, long long int)'
   12 |         for (int64_t j=i+1; j<=min(r, l + 2LL*2019); j++)
      |                                ~~~^~~~~~~~~~~~~~~~~
/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:12:35: note:   deduced conflicting types for parameter 'const _Tp' ('long int' and 'long long int')
   12 |         for (int64_t j=i+1; j<=min(r, l + 2LL*2019); j++)
      |                                ~~~^~~~~~~~~~~~~~~~~
/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
/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:12:35: note:   mismatched types 'std::initializer_list<_Tp>' and 'long int'
   12 |         for (int64_t j=i+1; j<=min(r, l + 2LL*2019); j++)
      |                                ~~~^~~~~~~~~~~~~~~~~