Compilare: main.cpp: In function 'int main()': main.cpp:18:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for (int j=0; j<x.size(); j++) | ~^~~~~~~~~ main.cpp:11:12: warning: unused variable 'k' [-Wunused-variable] 11 | int n, k, v; | ^ main.cpp:14:20: warning: 'n' is used uninitialized [-Wuninitialized] 14 | for (int i=0; i<n; i++) | ~^~ main.cpp:11:9: note: 'n' was declared here 11 | int n, k, v; | ^