Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:26:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void verifica()': main.cpp:52:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < c.size(); i++) ~~^~~~~~~~~~ main.cpp:54:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t = 0; t < v[c[i]].size(); i++) ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:72:13: warning: unused variable 'cat' [-Wunused-variable] int cat = 0; ^~~