Language: C++

#include <bits/stdc++.h>
using namespace std;

__int128 n, cost[4], cnt[4],po[4] = {1,2,4,8};
__int128 ans=0;

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

    for(int i = 0; i < 4; i++)cin>>cost[i];
    cin>>n;
    n*=4;

    for(int i = 3; i >= 0; i--){
        cnt[i] = (int)(n/po[i]);
        n -= cnt[i] * po[i];
    }

    for(int i = 2; i >= 0; i--){
        if(2*cost[i] < cost[i+1]){
            cnt[i] += 2 * cnt[i+1];
            cnt[i+1] = 0;
        }
    }
    for(int i = 0; i < 4; i++)ans+=cnt[i]*cost[i];
    cout<<ans<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:34: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and '__int128')
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                               ~~~^~~~~~~~~
      |                               |          |
      |                               |          __int128
      |                               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:10:42: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'short int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'short unsigned int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'unsigned int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'long int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'long unsigned int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'long long int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'long long unsigned int&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'float&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'double&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: cannot bind non-const lvalue reference of type 'long double&' to a value of type '__int128'
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
/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:10:42: error: invalid conversion from '__int128' to 'void*' [-fpermissive]
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
      |                                          |
      |                                          __int128
a.cc:10:42: error: cannot bind rvalue '(void*)((long int)cost[i])' 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:10:42: error: invalid conversion from '__int128' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   10 |     for(int i = 0; i < 4; i++)cin>>cost[i];
      |                                    ~~~~~~^
      |                                          |
      |                                          __int128
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_typ