Compilare: main.cpp: In function 'void dfs(int)': main.cpp:28:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lista[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:13: warning: unused variable 'x' [-Wunused-variable] int x, y, c; ^ main.cpp:41:16: warning: unused variable 'y' [-Wunused-variable] int x, y, c; ^ main.cpp:41:19: warning: unused variable 'c' [-Wunused-variable] int x, y, c; ^