Compilare: main.cpp: In function 'void topo(int)': main.cpp:21:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ad[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:30:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<in[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void rezolva()': main.cpp:55:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<comp[i].size();j++) ~^~~~~~~~~~~~~~~