./Main.cpp: In function ‘int main()’:
./Main.cpp:56:34: warning: comparison of integer expressions of different signedness: ‘std::stack<int>::size_type’ {aka ‘long unsigned int’} and ‘int’ [-Wsign-compare]
   56 |             if(pile[a.id].size() == k){
      |                ~~~~~~~~~~~~~~~~~~^~~~
./Main.cpp:74:34: warning: comparison of integer expressions of different signedness: ‘std::stack<int>::size_type’ {aka ‘long unsigned int’} and ‘int’ [-Wsign-compare]
   74 |             if(pile[a.id].size() == k){
      |                ~~~~~~~~~~~~~~~~~~^~~~
In file included from /usr/include/c++/9/map:60,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:81,
                 from ./Main.cpp:1:
/usr/include/c++/9/bits/stl_tree.h: In instantiation of ‘static const _Key& std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_S_key(std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type) [with _Key = node; _Val = node; _KeyOfValue = std::_Identity<node>; _Compare = comp; _Alloc = std::allocator<node>; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Const_Link_type = const std::_Rb_tree_node<node>*]’:
/usr/include/c++/9/bits/stl_tree.h:1929:36:   required from ‘std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::iterator std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_lower_bound(std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Link_type, std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Base_ptr, const _Key&) [with _Key = node; _Val = node; _KeyOfValue = std::_Identity<node>; _Compare = comp; _Alloc = std::allocator<node>; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::iterator = std::_Rb_tree_iterator<node>; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Link_type = std::_Rb_tree_node<node>*; std::_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_Base_ptr = std::_Rb_tree_node_base*]’
/usr/include/c++/9/bits/stl_tree.h:1282:56:   required from ‘std::_Rb_tree<_Key...