Compilare: user.cpp: In function ‘void drum()’: user.cpp:155:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(i=0;i<V[z].size();i++) ^ user.cpp:177:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(i=0;i<V[z].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:227:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<R.size();i++) cout<<R[i]<<" "; ^ user.cpp: In function ‘void citire()’: user.cpp:128:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:129:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp:136:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&t,&p); ^