Compilare: main.cpp: In function 'int main()': main.cpp:43:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int i=0; i<div.size(); i++) { | ~^~~~~~~~~~~ main.cpp:37:14: warning: unused variable 'o' [-Wunused-variable] 37 | bool o=false; | ^