Compilare: main.cpp: In function 'int search(int)': main.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i = 0; i < v[key].size(); ++i) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void erase(int)': main.cpp:27:9: warning: unused variable 's' [-Wunused-variable] 27 | int s = v[key].size() - 1; | ^