View Compilation Error

0_0_38811808_11310.cpp: In function 'int main()':
0_0_38811808_11310.cpp:134:67: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
  134 |         std::cout << nodes[1].ans + std::__lg(nodes[1].sz) + 1 << endl;
      |                                                                   ^~~~
      |                                                                   std::endl
In file included from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/bits/unique_ptr.h:42,
                 from gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/memory:78,
                 from .\stdc++.h:56:
gcc-13.1.0/lib/gcc/x86_64-w64-mingw32/13.1.0/include/c++/ostream:735:5: note: 'std::endl' declared here
  735 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~