Compilare: main.cpp: In function 'int main()': main.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i=0;i<v.size();i++) | ~^~~~~~~~~ main.cpp:33:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 33 | if(v.size() != 2*n-1 || !ok) | ~~~~~~~~~^~~~~~~~ main.cpp:15:9: warning: unused variable 'cnt' [-Wunused-variable] 15 | int cnt=0,x; | ^~~