Compilare: main.cpp: In function 'int alege_minim(int)': main.cpp:22:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<=set.size();j++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(set.size()<n){ ~~~~~~~~~~^~ main.cpp:58:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vecini[nod].size();i++){ ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int alege_minim(int)': main.cpp:30:12: warning: 'nod' may be used uninitialized in this function [-Wmaybe-uninitialized] return nod; ^~~