Compilare: main.cpp: In function 'void prim(int)': main.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < w[x].size(); i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int cmciclu(int, int)': main.cpp:50:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < apm[x].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:68:1: warning: control reaches end of non-void function [-Wreturn-type] } ^