Compilare: main.cpp: In function 'void insert(int, int)': main.cpp:13:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i = 0; i < H[aux].size(); ++i) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:58:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for(int j = 0; j < H[i].size(); ++j) | ~~^~~~~~~~~~~~~