Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:19: 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:51:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<c[i].size(); j++) ~^~~~~~~~~~~~ main.cpp:55:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<c[i].size()-1) ~^~~~~~~~~~~~~~ main.cpp:59:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<w[n1].size(); k++) ~^~~~~~~~~~~~~ main.cpp:66:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k!=w[n1].size()) ~^~~~~~~~~~~~~~ main.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=0; k<w[n2].size(); k++) ~^~~~~~~~~~~~~ main.cpp:85:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<inv.size(); i++) ~^~~~~~~~~~~