Compilare: main.cpp: In function 'int main()': main.cpp:57:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(int k=0;k<div.size();k++) | ~^~~~~~~~~~~ main.cpp:55:17: warning: variable 'r' set but not used [-Wunused-but-set-variable] 55 | int r=0; | ^