Compilare: main.cpp: In function 'int BFSX(int)': main.cpp:31:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<A[S[i]].size(); j++) ~^~~~~~~~~~~~~~~ main.cpp:41:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'int BFSY(int)': main.cpp:49:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<A[S[i]].size(); j++) ~^~~~~~~~~~~~~~~ main.cpp:58:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^