Compilare: main.cpp: In function 'int main()': main.cpp:11:17: warning: unused variable 'gcd' [-Wunused-variable] int t , k , gcd , i , exp , x , p , elem = 0 , st , dr , mid; ^~~ main.cpp:11:41: warning: unused variable 'elem' [-Wunused-variable] int t , k , gcd , i , exp , x , p , elem = 0 , st , dr , mid; ^~~~ main.cpp:13:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t); ^ main.cpp:67:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld",&n); ^ main.cpp:68:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&k); ^