Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:8:5: error: ‘u64’ was not declared in this scope u64 n; ^ user.cpp:8:9: error: expected ‘;’ before ‘n’ u64 n; ^ user.cpp:11:24: error: ‘n’ was not declared in this scope fscanf(f, "%lld", &n); ^ user.cpp:15:18: error: ‘j’ was not declared in this scope for (j = 1; j * i * i <= n; ++j) { ^