Compilare: user.cpp: In function ‘int main()’: user.cpp:68:18: warning: unused variable ‘x’ [-Wunused-variable] long long n, x, sInit = 0; ^ user.cpp:69:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &n); ^ user.cpp:72:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld", &a[i]); ^