func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long t = 0;     cin >> t;     long long a = 0, b = 0;     for (int i = 0; i < t; i++) {       cin >> a >> b;       long long dif = abs(a - b);       long long res = dif / 5;       dif = dif % 5;       res += dif / 2;       dif %= 2;       res += dif;       cout << res << endl;     }     return 0;   }   