Compilare: main.cpp: In function 'void DFS(int)': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int verif()': main.cpp:28:9: warning: variable 'finish' set but not used [-Wunused-but-set-variable] int finish = 0; ^~~~~~ main.cpp: In function 'int main()': main.cpp:96:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); ++i) ~~^~~~~~~~~~~~