Compilare: user.cpp: In function ‘int main()’: user.cpp:22:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()+n-i<m) st.push(s); ^ user.cpp:25:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(!st.empty() && st.top()<s && st.size()+n-i>=m) ^ user.cpp:27:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<m) st.push(s); ^