Compilare: user.cpp: In function ‘int main()’: user.cpp:42:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((x>st.top())&&(n-i+st.size()>=m)&&(st.size()==1)) ^ user.cpp:48:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((x>st.top())&&(n-i+st.size()>=m)&&(st.size()>1)) ^ user.cpp:54:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (st.size()<m) st.push(x); ^ user.cpp:20:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:27:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%1d",&x); ^