Compilare: main.cpp: In function 'void dfs(int)': main.cpp:23:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[x].size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'void dfs_reverse(int, int)': main.cpp:37:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<vr[x].size(); i++) ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:89:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<componente.size(); i++) ~^~~~~~~~~~~~~~~~~~ main.cpp:91:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<componente[i].size(); j++) ~^~~~~~~~~~~~~~~~~~~~~