Compilare: user.cpp: In function ‘long long int lgput(long long int)’: user.cpp:55:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:72:75: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld %lld %lld %lld %lld %lld", &a, &b, &c, &x1, &x2, &n); ^