Compilare: main.cpp: In function 'void rec(int, int)': main.cpp:19:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp:13:8: warning: unused variable 'isnod' [-Wunused-variable] bool isnod=false; ^~~~~ main.cpp: In function 'int main()': main.cpp:52:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<rasp[i].size();j++) ~^~~~~~~~~~~~~~~