Compilare: main.cpp: In function 'void subarb(int)': main.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void compute_chains(int)': main.cpp:74:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void compute_labels(int)': main.cpp:88:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < g[nod].size(); i++) ~~^~~~~~~~~~~~~~~