Compilare: main.cpp: In function 'int main()': main.cpp:26:19: warning: unused variable 'n2' [-Wunused-variable] long long n,d,n2; ^~ main.cpp:27:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld",&n); ^ main.cpp:28:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&k); ^