#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int a,b,c,d,e;
  cin >> a >> b >> c >> d >> e;
  int count=0;
  for(int i=0;i<e;i++){
    if((i+1) % (a+b) <= a && (i+1) % (a+b) != 0 && (i+1) % (c+d) != 0){
      if((i+1) % (c+d) <= c && (i+1) % (c+d) != 0){
        count++;
      }
    }
  }
  cout << count;
}