Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:22:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i<v[r].size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:33:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i<t[r].size(); i++) ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j<comp[i].size(); j++) ~^~~~~~~~~~~~~~~