Compilare: user.cpp: In function ‘int main()’: user.cpp:28:23: warning: unused variable ‘prod’ [-Wunused-variable] long long prod = 1; ^~~~ user.cpp:9:9: warning: unused variable ‘number_of_tests’ [-Wunused-variable] int number_of_tests , n , maximum , number , second , ok, k,div; ^~~~~~~~~~~~~~~ user.cpp:10:15: warning: variable ‘prodmin’ set but not used [-Wunused-but-set-variable] long long prodmin; ^~~~~~~ user.cpp:11:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmmdc2.in","r",stdin); ^ user.cpp:12:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmmdc2.out","w",stdout); ^ user.cpp:13:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:17:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &number); ^ user.cpp:42:17: warning: ‘div’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(v[i] % div == 0 && k > 0){ ~~~~~^~~~~