#include #include using namespace std; long long min$\_$operations$($long long A$,$ long long B$,$ long long C$,$ long long D$)\{$ if $($A $<=$ D $*$ C$)\{$ return $0$; $\}$ long long additional$\_$gems $=$ B $-$ D $*$ C; if $($additional$\_$gems $<=0)\{$ return $-1$; $\}$ long long operations $=$ ceil$(($double$)($A $-$ D $*$ C$)/$ additional$\_$gems$)$; return operations; $\}$ int main$()\{$ long long A$,$ B$,$ C$,$