Compilare: user.cpp: In function ‘int main()’: user.cpp:27:20: warning: variable ‘rst’ set but not used [-Wunused-but-set-variable] int t ,sol, i, rst; ^ user.cpp:28:15: warning: unused variable ‘x’ [-Wunused-variable] long long x; ^ user.cpp:29:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d\n",&t); ^ user.cpp:32:26: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets (s,501,fin); ^