#include template inline bool chmin(T&a, T b){if(a > b){a = b; return true;}else{return false;}} template inline bool chmax(T&a, T b){if(a < b){a = b; return true;}else{return false;}} #define ll long long #define double long double #define rep(i,n) for(int i=0;i<(n);i++) #define REP(i,n) for(int i=1;i<=(n);i++) #define mod (ll)(1e9+7) #define inf (ll)(3e18+7) #define eps (double)(1e-9) #define pi (double) acos(-1) #define P pair #define PiP pair> #define all(x) x.begin(),x.end() #define rall(x) x.rbegin(),x.rend() using namespace std; int main() { int a, b, c, d, e; cin >> a >> b >> c >> d >> e; ll ans = 0, x = (a+b), y = (c+d); if(e <= x*y){ rep(i, e){ if(i % x < a && i % y < c)ans++; } cout << ans << endl; return 0; } REP(i, x*y){ if(i % x < a && i % y < c)ans++; } ans *= e/(x*y); e %= (x*y); REP(i, e){ if(i % x < a && i % y < c)ans++; } cout << ans << endl; }