Compilare: user.cpp: In function ‘int mst()’: user.cpp:69:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<A[W].size();j++) ^ user.cpp: In function ‘int mst1()’: user.cpp:104:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<B[W].size();j++) ^ user.cpp: In function ‘bool searchF(int, int, int)’: user.cpp:127:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<B[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:144:9: warning: unused variable ‘Q’ [-Wunused-variable] muchie Q; ^ user.cpp: In function ‘int down(int)’: user.cpp:45:1: warning: control reaches end of non-void function [-Wreturn-type] } ^