Compilare: user.cpp: In function ‘void ins(int)’: user.cpp:16:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t=0;t<v[key].size();t++) ^ user.cpp: In function ‘int query(int)’: user.cpp:27:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int t=0;t<v[key].size();t++) ^ user.cpp: In function ‘int main()’: user.cpp:39:9: warning: unused variable ‘clash’ [-Wunused-variable] int clash=0; ^