Compilare: main.cpp: In function 'int main()': main.cpp:32:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for(int i=0;i<res.size();i++) | ~^~~~~~~~~~~ main.cpp:12:13: warning: unused variable 'j' [-Wunused-variable] 12 | int n,i,j,k; | ^ main.cpp:12:15: warning: unused variable 'k' [-Wunused-variable] 12 | int n,i,j,k; | ^