Language: C++

#include <iostream>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <string>
#include <map>
#include <tuple>
#include <math.h>
#include <deque>
#include <stack>

using namespace std;

typedef long long ll;

bool enough(vector<ll> h, ll a, ll b, ll t){
  ll dif = a - b;
  ll need = 0;
  for(ll i = 0;i < h.size(); i++){
    need += max(0, ((h[i] - b * t) / dif));
  }
  if(need <= t){
    return true;
  }else{
    return false;
  }
}

int solve() {
  ll n, a, b;
  cin >> n >> a >> b;
  vector<ll> h(n);
  for(ll i = 0;i < n;i++){
    cin >> h[i];
  }
  ll mx = 1000000000;
  ll mn = 0;
  ll mid = -1;
  while(mx >= mn) {
    mid = mn + (mx - mn) / 2;
    if(enough(h, a, b, mid)){
      mx = mid - 1;
    } else {
      mn = mid + 1;
    }
  }
  cout << mid + 1 << endl;

  return 0;
}

int main(void){
  solve();
  return 0;
}


Compiler output:
a.cc: In function 'bool enough(std::vector<long long int>, ll, ll, ll)':
a.cc:20:16: error: no matching function for call to 'max(int, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type)'
   20 |     need += max(0, ((h[i] - b * t) / dif));
      |             ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/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:20:16: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'})
   20 |     need += max(0, ((h[i] - b * t) / dif));
      |             ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/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
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:3:
/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:20:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   20 |     need += max(0, ((h[i] - b * t) / dif));
      |             ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~