Compilare: main.cpp: In function 'void mo(long long int)': main.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i = 0 ; i < bucket[buck].size() ;i++){ ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:87:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i = 0 ; i < query.size() ;i++) ~~^~~~~~~~~~~~~~