Compilare: main.cpp: In function 'int main()': main.cpp:29:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(!st.empty() and st.size()+n-poz+1>m) ~~~~~~~~~~~~~~~~~^~ main.cpp:31:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(!st.empty() and st.size()+n-poz+1>m and st.top()<val) ~~~~~~~~~~~~~~~~~^~