Compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[nod].size();i++){ ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<h[md].size();i++){ ~^~~~~~~~~~~~~ main.cpp:62:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i>=h[md].size()){ ~^~~~~~~~~~~~~~ main.cpp:53:13: warning: unused variable 'nr' [-Wunused-variable] int nr=0; ^~