Compilare: user.cpp: In function ‘int main()’: user.cpp:45:28: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘__gnu_cxx::__alloc_traits<std::allocator<long long int> >::value_type* {aka long long int*}’ [-Wformat=] fscanf(in, "%ld", &v[i]); ^ user.cpp:48:44: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(out, "%ld\n", ans(U) - ans(L - 1)); ^ user.cpp:38:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &N); ^ user.cpp:39:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &L); ^ user.cpp:40:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &U); ^ user.cpp:45:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld", &v[i]); ^