Compilare: main.cpp: In function 'int main()': main.cpp:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(i=0;i<vec.size();i++) | ~^~~~~~~~~~~ main.cpp:14:15: warning: unused variable 'k' [-Wunused-variable] 14 | int n,i,j,k,l,t,op,cnt; | ^ main.cpp:14:17: warning: unused variable 'l' [-Wunused-variable] 14 | int n,i,j,k,l,t,op,cnt; | ^