Compilare: main.cpp: In function 'void add(int)': main.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i = 0; i < buckets[x_bucket].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void del(int)': main.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i = 0; i < buckets[x_bucket].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool exists(int)': main.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = 0; i < buckets[x_bucket].size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~