Compilare: main.cpp: In function 'void dfs(int)': main.cpp:25:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<v[x].size();i++) ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:39:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<inv[x].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:98:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<comp[i].size();j++) ~^~~~~~~~~~~~~~~