#include #include using namespace std; double a[3010]; int main() { double* E=a+1001; int H, A, D; while (cin>>H>>A>>D) { fill(E, E+2000, 100000); E[0]=0; for(int i=0;i<=H;++i) { E[i+A]=min(E[i+A], E[i]+1); E[i+D]=min(E[i+D], E[i]+1.5); } double res=100000; for(int i=H;i<=H+max(A,D);++i) if (E[i]>0) res=min(res, E[i]); cout<