Compilare: main.cpp: In function 'int exista(std::vector<int>&, int)': main.cpp:12:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i=0; i<h.size(); i++){ | ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i=0; i<h[x%666013].size(); i++) | ~^~~~~~~~~~~~~~~~~~~