Compilare: user.cpp: In function ‘void kruskal()’: user.cpp:84:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < edges.size(); i++) { ^ user.cpp:83:9: warning: unused variable ‘apm_size’ [-Wunused-variable] int apm_size = 1; ^ user.cpp: In function ‘void print()’: user.cpp:101:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < apm_chosen_edges.size(); i++) { ^