#include <bits/stdc++.h>
#define int long long
#define rint register int
#define up(v,s,t,st) for(rint v=s;v<=t;v+=st)
#define down(v,s,t,st) for(rint v=s;v<t;v+=st)
#define ite(v, cont) for(const auto& v:cont)
#define aite(v, cont) for(auto &v:cont)
#define sp(t) !(t&(t-1))
const int mod = 1e9+7;
using namespace std;
void exgcd(int a, int b, int& x, int& y)
{
    if(b==0)
    {
        x=1;
        y=0;
        return ;
    }
    int tx, ty;
    exgcd(b, a%b, tx, ty);
    x=ty;
    y=tx-a/b*ty;
}
signed main()
{
    int x,y,m,n,L;
    cin>>x>>y>>m>>n>>L;
    int t,a;
    int g = __gcd(n-m, L);
    if((x-y)%g!=0)
    {
        cout<<"Impossible\n";
        return 0;
    }
    exgcd(L, n-m, t, a);
    int p = (x-y)/g;
    t*=p, a*=p;
    if(a<0)
    {
        int w = ceil((double)(-a)/L);
        a=a+w*L;
        cout<<a;
    }
    else if(a>=0)
    {
        int w = a/L;
        a=a-w*L;
        cout<<a;
    }
}

谢谢大佬🙏