View Compilation Error

0_0_39219663_21254.cpp: In function 'int main()':
0_0_39219663_21254.cpp:13:17: error: 'sort' was not declared in this scope
   13 |                 sort(arr1, arr1 + n + m);
      |                 ^~~~
0_0_39219663_21254.cpp:13:17: note: suggested alternatives:
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/algorithm:73,
                 from 0_0_39219663_21254.cpp:3:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/pstl/glue_algorithm_defs.h:296:1: note:   'std::sort'
  296 | sort(_ExecutionPolicy&& __exec, _RandomAccessIterator __first, _RandomAccessIterator __last);
      | ^~~~
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/algorithm:63:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/ranges_algo.h:1801:30: note:   'std::ranges::sort'
 1801 |   inline constexpr __sort_fn sort{};
      |                              ^~~~