Compilare: user.cpp: In function ‘void adauga(int, int)’: user.cpp:12:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[key].size();++i) ^ user.cpp: In function ‘void toate()’: user.cpp:24:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<h[i].size();++j) ^ user.cpp: In function ‘int main()’: user.cpp:47:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();++i) ^