Compilare: main.cpp: In function 'int main()': main.cpp:37:13: warning: unused variable 'lg' [-Wunused-variable] int lg=v[nod].size(); ^~ main.cpp:42:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int indx=0;indx<nivel[lvl].size();indx++) ~~~~^~~~~~~~~~~~~~~~~~ main.cpp:47:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int indx1=0;indx1<v[nod].size();indx1++) ~~~~~^~~~~~~~~~~~~~ main.cpp:51:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int indx2=indx1+1;indx2<v[nod].size();indx2++) ~~~~~^~~~~~~~~~~~~~ main.cpp:58:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int indx1=0;indx1<v[nod].size();indx1++) ~~~~~^~~~~~~~~~~~~~