Compilare: main.cpp: In function 'void add(int)': main.cpp:14:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | while(i < buckets[x_bucket].size() && buckets[x_bucket][i] != x) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:17:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | if(i == buckets[x_bucket].size()) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void del(int)': main.cpp:25:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while(i < buckets[x_bucket].size() && buckets[x_bucket][i] != x) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:28:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if(i < buckets[x_bucket].size()) { | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool exists(int)': main.cpp:39:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | while(i < buckets[x_bucket].size() && buckets[x_bucket][i] != x) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:42:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | return i < buckets[x_bucket].size(); | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~