Language: C++

#include<bits/stdc++.h>
using namespace std;
int H, W, K;
int MAP[1000][1000];
int x, y, vis[1000][1000];
int ans = 2147483647;
const int dx[4] = {0, 1, 0, -1};
const int dy[4] = {1, 0, -1, 0};
struct PR {
    int x, y, now;
    PR() {x = y = now = 0;}
    PR(int _x, int _y, int _now) {x = _x, y = _y, now = _now;}
};
bool check(int x, int y) {
    if (x < 0 || x > H) return 0;
    if (y < 0 || y > W) return 0;
    if (MAP[x][y]) return 0;
    return 1;
}
int main() {
    cin >> H >> W >> K;
    for (int i = 1; i <= H; i ++) {
        string s;
        cin >> s;
        for (int j = 1; j <= W; j ++) {
            if (s[j - 1] == '#') MAP[i][j] = 1;
            else {
                MAP[i][j] = 0;
                if (s[j - 1] == 'S') x = i, y = j; 
            }
        }
    }
    queue<PR> Q; Q.push((PR){x, y, 0});
    while (!Q.empty()) {
        PR tmp = Q.front(); Q.pop();
        if (tmp.now > K) continue;
        if (vis[tmp.x][tmp.y] <= tmp.now && vis[tmp.x][tmp.y] != 0) continue;
        vis[tmp.x][tmp.y] = tmp.now;
		int num = min(min(H - tmp.x, W - tmp.y), min(tmp.x - 1, tmp.y - 1));
		tmp = (tmp + K - 1) / K;
		if (tmp + 1 > ans) continue;
		ans = min(ans, tmp + 1);
        for (int i = 0; i < 4; i ++) {
            if (check(tmp.x + dx[i], tmp.y + dy[i])) Q.push((PR){tmp.x + dx[i], tmp.y + dy[i], tmp.now + 1});
        }
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:40:28: error: no match for 'operator+' (operand types are 'PR' and 'int')
   40 |                 tmp = (tmp + K - 1) / K;
      |                        ~~~ ^ ~
      |                        |     |
      |                        PR    int
In file included from /usr/include/c++/14/bits/stl_algobase.h:67,
                 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_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:40:30: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/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:40:30: note:   'PR' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   mismatched types 'const _CharT*' and 'PR'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   'PR' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   'PR' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   'PR' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   'PR' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   'PR' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   mismatched types 'const _CharT*' and 'PR'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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:40:30: note:   'PR' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
/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,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3740:5: note:   template argument deduction/substitution failed:
a.cc:40:30: note:   'PR' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   40 |                 tmp = (tmp + K - 1) / K;
      |                              ^
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/complex:340:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator+(const complex<_Tp>&, const complex<_Tp>&)'
  340 |     operator+(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:340:5: note:   template argument deduction/substitution failed:
a.cc:40:30: note: