func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 1e6 + 5;   int a[MAXN], x, f, b, n;   vector<int> v;   int main() {     cin >> n;     for (int i = 0; i < n; i++) cin >> a[i];     cin >> f >> b;     sort(a, a + n);     n = unique(a, a + n) - a;     for (int i = 0; i < n; i++) v.push_back(a[i]);     int tmp;     while (f != b) {       tmp = f - 1;       for (int i = v.size() - 1; ~i; i--) {         if (f - f % v[i] < b)           v.erase(v.begin() + i);         else           tmp = min(tmp, f - f % v[i]);       }       x++;       f = tmp;     }     cout << x;     return 0;   }   