Compilare: main.cpp: In function 'void dfs(int)': main.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < G[i].size(); j++) ~~^~~~~~~~~~~~~ main.cpp:98:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < G[i].size(); j++) ~~^~~~~~~~~~~~~ main.cpp:106:13: warning: unused variable 'nr1' [-Wunused-variable] int nr1 = 0; ^~~ main.cpp:107:13: warning: unused variable 'nr0' [-Wunused-variable] int nr0 = 0; ^~~