Compilare: user.cpp: In function ‘int nrHash(int, int)’: user.cpp:90:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[x].size();i++) ^ user.cpp: In function ‘void addHash(int, int)’: user.cpp:101:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[x].size();i++) ^ user.cpp: In function ‘int tata()’: user.cpp:60:1: warning: control reaches end of non-void function [-Wreturn-type] } ^