Compilare: main.cpp: In function 'void dfs(int, int&, int&)': main.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<v[i].size();j++){ ~^~~~~~~~~~~~ main.cpp:58:11: warning: unused variable 'nr' [-Wunused-variable] int i,nr,cc=0,nr1,nr2,s=0,p2; ^~