Compilare: user.cpp: In function ‘void citire()’: user.cpp:11:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;++i) ^ user.cpp: In function ‘void k_element(int, int)’: user.cpp:19:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<=dr&&v[i]<pivot) ++i; ^ user.cpp:20:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(st<=j&&pivot<v[j]) --j; ^ user.cpp:29:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k<=j&&st<=j) ^ user.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<=dr&&k>=i) ^