Compilare: main.cpp: In function 'std::array<node*, 2ul> split(node*, int)': main.cpp:65:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz==a->subtreesize) ~~~^~~~~~~~~~~~~~~~ main.cpp:67:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(getsize(a->l)<poz) ~~~~~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:119:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ~^~~~~~~~~ main.cpp:136:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<s.size();j++) ~^~~~~~~~~