Language: C++

#include <fstream>
#include <numeric>
#include <unordered_set>
#include <sstream>
#include <cassert>
#include <tuple>
#include <iomanip>
#include <random>
#include <iostream>
#include <algorithm>
#include <stdio.h>
#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <queue>
#include <chrono>
#include <stack>
#include <string>
#include <bitset>
#include <unordered_map>
#include <cstdio>
#include <limits>
#include <vector>
#include <climits>
#include <cstring>
#include <cstdlib>
 
using namespace std;
 
#define ll long long
const int N = (ll)(2e5) + 100;
 
int ptr = 0;

int div(int x, int y) {
	return x + y - 1 / y;
}

void solve() {
    int n,k;cin >> n >> k;
    int a[n + 1];
    for (int i = 1;i <= n;i ++) {
        cin >> a[i];
    }
    int min_pos = 1;
    for (int i = 1;i <= n;i ++) {
        if (a[i] < a[min_pos]) {
            min_pos = i;
        }
    }
    int left = div(min_pos - k, (k - 1)) + 1;
    int right = div((n - min_pos + 1 - k), (k - 1)) + 1;
    int ans = int(left) + int(right);
    cout << ans << "\n";
}

void test() {
}

int main() {
    freopen("debug.txt", "w", stderr);
    solve();
    return 0;
}

Compiler output:
a.cc:38:5: error: ambiguating new declaration of 'int div(int, int)'
   38 | int div(int x, int y) {
      |     ^~~
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/c++/14/ext/string_conversions.h:43,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 from /usr/include/c++/14/string:54,
                 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/istream:40,
                 from /usr/include/c++/14/fstream:40,
                 from a.cc:1:
/usr/include/stdlib.h:992:14: note: old declaration 'div_t div(int, int)'
  992 | extern div_t div (int __numer, int __denom)
      |              ^~~
a.cc: In function 'void solve()':
a.cc:54:42: error: no match for 'operator+' (operand types are 'div_t' and 'int')
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                ~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~
      |                   |                        |
      |                   div_t                    int
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:627:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename reverse_iterator<_Iterator>::difference_type, const reverse_iterator<_Iterator>&)'
  627 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1798 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3598:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3598 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3598:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   'div_t' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3616:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3616 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   mismatched types 'const _CharT*' and 'div_t'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3635:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3635 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3652:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3652 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   'div_t' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3670:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3670 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   'div_t' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3682:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3682 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   'div_t' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3689:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3689 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   'div_t' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3696:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3696 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   'div_t' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3719:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3719 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   mismatched types 'const _CharT*' and 'div_t'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3726:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3726 |     operator+(_CharT __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3726:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3733:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const _CharT*)'
 3733 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3733:5: note:   template argument deduction/substitution failed:
a.cc:54:44: note:   'div_t' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   54 |     int left = div(min_pos - k, (k - 1)) + 1;
      |                                            ^
/usr/include/c++/14/bits/basic_string.h:3740:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, _CharT)'
 3740 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,