Language: C++

#include <bits/stdc++.h>

using namespace std;

int p;
int x1[128], y1[128], x2[128], y2[128];

bool ok(int Y1, int X1, int Y2, int X2)
{
    for (int i = 0; i < p; i++){
        if (x1[i] <= X1 && X2 <= x2[i] && y1[i] <= Y1 && Y2 <= y2[i])
            return (false);
    }
    return (true);
}

int main()
{
    int T;
    
    scanf("%d", &T);
    
    while (T--){
        int mp[16][16] = {0};
        int w, h;
        scanf("%d %d", &w, &h);
        
        mp[0][0] = 1;
        
        scanf("%d", &p);
        for (int i = 0; i < p; i++){
            scanf("%d %d %d %d", x1 + i, y1 + i, x2 + i, y2 + i);
            if (x1[i] > x2[i]) swap(x1[i], x2[i]);
            if (y1[i] > y2[i]) swap(y1[i], y2[i]);
        }
        
        for (int i = 0; i <= h; i++){
            for (int j = 0; j <= w; j++){
                if (i && ok(i - 1, j, i, j)) mp[i][j] += mp[i - 1][j];
                if (j && ok(i, j - 1, i, j)) mp[i][j] += mp[i][j - 1];
            }
        }
        
        if (mp[h][w] <= 0) printf("Miserable Hokusai!\n");
        else printf("%d\n", mp[h][w]);
    }
    
    return (0);
}

Compiler output:
a.cc:6:20: error: 'int y1 [128]' redeclared as different kind of entity
    6 | int x1[128], y1[128], x2[128], y2[128];
      |                    ^
In file included from /usr/include/features.h:523,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/c++config.h:683,
                 from /usr/include/c++/14/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:33,
                 from a.cc:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:257:1: note: previous declaration 'double y1(double)'
  257 | __MATHCALL (y1,, (_Mdouble_));
      | ^~~~~~~~~~
a.cc: In function 'bool ok(int, int, int, int)':
a.cc:11:47: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   11 |         if (x1[i] <= X1 && X2 <= x2[i] && y1[i] <= Y1 && Y2 <= y2[i])
      |                                               ^
a.cc:11:49: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   11 |         if (x1[i] <= X1 && X2 <= x2[i] && y1[i] <= Y1 && Y2 <= y2[i])
      |                                           ~~~~~~^~~~~
a.cc: In function 'int main()':
a.cc:32:45: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   32 |             scanf("%d %d %d %d", x1 + i, y1 + i, x2 + i, y2 + i);
      |                                          ~~~^~~
a.cc:34:21: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                     ^
a.cc:34:23: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                 ~~~~~~^~~~~~~
a.cc:34:41: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                         ^
a.cc:34:36: error: no matching function for call to 'swap(double (&)(double) noexcept, int&)'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:77:
/usr/include/c++/14/any:430:15: note: candidate: 'void std::swap(any&, any&)' (near match)
  430 |   inline void swap(any& __x, any& __y) noexcept { __x.swap(__y); }
      |               ^~~~
/usr/include/c++/14/any:430:15: note:   conversion of argument 2 would be ill-formed:
a.cc:34:48: error: cannot bind non-const lvalue reference of type 'std::any&' to an rvalue of type 'std::any'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                            ~~~~^
/usr/include/c++/14/any:191:7: note:   after user-defined conversion: 'std::any::any(_Tp&&) [with _Tp = int&; _VTp = int; _Mgr = _Manager_internal<int>; typename std::enable_if<(is_copy_constructible_v<_VTp> && (! __is_in_place_type_v<_VTp>)), bool>::type <anonymous> = true]'
  191 |       any(_Tp&& __value)
      |       ^~~
In file included from /usr/include/c++/14/exception:166,
                 from /usr/include/c++/14/stdexcept:38,
                 from /usr/include/c++/14/system_error:43,
                 from /usr/include/c++/14/bits/ios_base.h:46,
                 from /usr/include/c++/14/streambuf:43,
                 from /usr/include/c++/14/bits/streambuf_iterator.h:35,
                 from /usr/include/c++/14/iterator:66,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:54:
/usr/include/c++/14/bits/exception_ptr.h:229:5: note: candidate: 'void std::__exception_ptr::swap(exception_ptr&, exception_ptr&)'
  229 |     swap(exception_ptr& __lhs, exception_ptr& __rhs)
      |     ^~~~
/usr/include/c++/14/bits/exception_ptr.h:229:25: note:   no known conversion for argument 1 from 'double(double) noexcept' to 'std::__exception_ptr::exception_ptr&'
  229 |     swap(exception_ptr& __lhs, exception_ptr& __rhs)
      |          ~~~~~~~~~~~~~~~^~~~~
In file included from /usr/include/c++/14/future:51,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:176:
/usr/include/c++/14/bits/std_thread.h:328:3: note: candidate: 'void std::swap(thread&, thread&)'
  328 |   swap(thread& __x, thread& __y) noexcept
      |   ^~~~
/usr/include/c++/14/bits/std_thread.h:328:16: note:   no known conversion for argument 1 from 'double(double) noexcept' to 'std::thread&'
  328 |   swap(thread& __x, thread& __y) noexcept
      |        ~~~~~~~~^~~
In file included 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:
/usr/include/c++/14/sstream:1204:5: note: candidate: 'template<class _CharT, class _Traits, class _Allocator> void std::__cxx11::swap(basic_stringbuf<_CharT, _Traits, _Alloc>&, basic_stringbuf<_CharT, _Traits, _Alloc>&)'
 1204 |     swap(basic_stringbuf<_CharT, _Traits, _Allocator>& __x,
      |     ^~~~
/usr/include/c++/14/sstream:1204:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   mismatched types 'std::__cxx11::basic_stringbuf<_CharT, _Traits, _Alloc>' and 'double(double) noexcept'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/sstream:1212:5: note: candidate: 'template<class _CharT, class _Traits, class _Allocator> void std::__cxx11::swap(basic_istringstream<_CharT, _Traits, _Allocator>&, basic_istringstream<_CharT, _Traits, _Allocator>&)'
 1212 |     swap(basic_istringstream<_CharT, _Traits, _Allocator>& __x,
      |     ^~~~
/usr/include/c++/14/sstream:1212:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   mismatched types 'std::__cxx11::basic_istringstream<_CharT, _Traits, _Allocator>' and 'double(double) noexcept'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/sstream:1219:5: note: candidate: 'template<class _CharT, class _Traits, class _Allocator> void std::__cxx11::swap(basic_ostringstream<_CharT, _Traits, _Allocator>&, basic_ostringstream<_CharT, _Traits, _Allocator>&)'
 1219 |     swap(basic_ostringstream<_CharT, _Traits, _Allocator>& __x,
      |     ^~~~
/usr/include/c++/14/sstream:1219:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   mismatched types 'std::__cxx11::basic_ostringstream<_CharT, _Traits, _Allocator>' and 'double(double) noexcept'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/sstream:1226:5: note: candidate: 'template<class _CharT, class _Traits, class _Allocator> void std::__cxx11::swap(basic_stringstream<_CharT, _Traits, _Allocator>&, basic_stringstream<_CharT, _Traits, _Allocator>&)'
 1226 |     swap(basic_stringstream<_CharT, _Traits, _Allocator>& __x,
      |     ^~~~
/usr/include/c++/14/sstream:1226:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   mismatched types 'std::__cxx11::basic_stringstream<_CharT, _Traits, _Allocator>' and 'double(double) noexcept'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181:
/usr/include/c++/14/bits/regex.h:896:5: note: candidate: 'template<class _Ch_type, class _Rx_traits> void std::__cxx11::swap(basic_regex<_Ch_type, _Rx_traits>&, basic_regex<_Ch_type, _Rx_traits>&)'
  896 |     swap(basic_regex<_Ch_type, _Rx_traits>& __lhs,
      |     ^~~~
/usr/include/c++/14/bits/regex.h:896:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   mismatched types 'std::__cxx11::basic_regex<_Ch_type, _Rx_traits>' and 'double(double) noexcept'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/bits/regex.h:2230:5: note: candidate: 'template<class _Bi_iter, class _Alloc> void std::__cxx11::swap(match_results<_BiIter, _Alloc>&, match_results<_BiIter, _Alloc>&)'
 2230 |     swap(match_results<_Bi_iter, _Alloc>& __lhs,
      |     ^~~~
/usr/include/c++/14/bits/regex.h:2230:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   mismatched types 'std::__cxx11::match_results<_BiIter, _Alloc>' and 'double(double) noexcept'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
In file included from /usr/include/c++/14/bits/stl_pair.h:61,
                 from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/move.h:226:5: note: candidate: 'template<class _Tp> std::_Require<std::__not_<std::__is_tuple_like<_Tp> >, std::is_move_constructible<_Tp>, std::is_move_assignable<_Tp> > std::swap(_Tp&, _Tp&)'
  226 |     swap(_Tp& __a, _Tp& __b)
      |     ^~~~
/usr/include/c++/14/bits/move.h:226:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   deduced conflicting types for parameter '_Tp' ('double(double) noexcept' and 'int')
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/bits/move.h:250:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> std::__enable_if_t<((bool)std::__is_swappable<_Tp>::value)> std::swap(_Tp (&)[_Nm], _Tp (&)[_Nm])'
  250 |     swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
      |     ^~~~
/usr/include/c++/14/bits/move.h:250:5: note:   template argument deduction/substitution failed:
a.cc:34:36: note:   mismatched types '_Tp [_Nm]' and 'double(double) noexcept'
   34 |             if (y1[i] > y2[i]) swap(y1[i], y2[i]);
      |                                ~~~~^~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1089:5: note: candidate: 'template<class _T1, class _T2> typename std::enable_if<std: