#include <iostream>

using namespace std;

int main()
{
   int x,y,m,n,l,s;
   while(cin>>x>>y>>m>>n>>l)
   {
   if(m>n)
      if(x<y) s=y-x;
      else    s=y-x+l;
   else if (x<y) s=l-y+x;
        else s=x-y;
   if(s%(m-n)!=0||m==n)
      cout<<"Impossible";
   else if(m>n) cout<<s/(m-n);
      else cout<<s/(n-m);
   }
   return 0;
}

• 你的世界观过于狭隘了 (55) xfxyjwf 2008-01-04 19:23:02