Compilare: main.cpp: In function 'int main()': main.cpp:143:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 143 | for(i=0;i<v2.size()-1;i++) | ~^~~~~~~~~~~~ main.cpp:18:25: warning: unused variable 'x' [-Wunused-variable] 18 | long long n,i,j,cer,x; | ^