Compilare: user.cpp: In function ‘int main()’: user.cpp:23:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(contor<=n && d.size()<k) ^ user.cpp:37:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d.size()>k) d.pop_front(); ^ user.cpp:38:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(d.size()==k) nr+=d[1]-d.front(); ^ user.cpp:40:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else{if(d.size()==k) nr++;} ^