Compilare: user.cpp: In function ‘int main()’: user.cpp:42:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((x>st.top())&&(n-i-1+st.size()>=m)) ^ user.cpp:47:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else 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); ^