Compilare: user.cpp: In function ‘void ins(int, int, int, int, int)’: user.cpp:16:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int idx=0;idx<v[key].size();idx++) ^ user.cpp: In function ‘int finds()’: user.cpp:33:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int idx=0;idx<v[key].size();idx++) ^