Compilare: user.cpp: In function ‘int main()’: user.cpp:21:31: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type* {aka long long int*}’ [-Wformat=] fscanf(is, "%d", &a[i]); ^ user.cpp: In function ‘void Path(int)’: user.cpp:39:28: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type {aka long long int}’ [-Wformat=] fprintf(os, "%d ", a[i]); ^