Compilare: main.cpp: In function 'int main()': main.cpp:43:22: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=] 43 | fprintf( fout, "%d ", v.size() ); | ~^ ~~~~~~~~ | | | | int std::vector<int>::size_type {aka long unsigned int} | %ld main.cpp:22:24: warning: unused variable 'd' [-Wunused-variable] 22 | long long x, prod, d; | ^