Compilare: user.cpp: In function ‘int insert(muchie)’: user.cpp:27:7: warning: unused variable ‘q’ [-Wunused-variable] int *q=NULL; ^ user.cpp: In function ‘int mst()’: user.cpp:74:23: 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:104:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<B[x].size();i++) ^ user.cpp: In function ‘int searchF(int, int, int)’: user.cpp:119:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<B[x].size();i++) ^ user.cpp:128:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<B[y].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:173:19: warning: unused variable ‘q’ [-Wunused-variable] int x,y,z,K,T,R,*q=NULL; ^ user.cpp:174:9: warning: unused variable ‘Q’ [-Wunused-variable] muchie Q; ^ user.cpp: In function ‘int down(int)’: user.cpp:50:1: warning: control reaches end of non-void function [-Wreturn-type] } ^