Compilare: user.cpp: In function ‘int mst()’: user.cpp:70:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<A[W].size();j++) ^ user.cpp: In function ‘bool chk(int, int)’: user.cpp:99:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<B[x].size();i++) ^ user.cpp: In function ‘bool searchF(int, int, int)’: user.cpp:111:26: 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:158:9: warning: unused variable ‘Q’ [-Wunused-variable] muchie Q; ^ user.cpp: In function ‘int down(int)’: user.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] } ^