#include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int a, b, c, d, m;
    cin >> a >> b >> c >> d >> m;
    
    int v = (b-a+1) + (d-c+1);
    if(v>=m) cout << m-1 << '\n';
    else{
        int p = ((a + c) % m + v - 2) % m;
        if(p < (a + c) % m) cout << m-1 << '\n';
        else cout << p << '\n';
    }
}