func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     long long a, b;     cin >> a >> b;     long long ans = abs(a - b) / 5;     a = abs(a - b) % 5;     if (a == 4) cout << ans + 2;     if (a == 3) cout << ans + 2;     if (a == 2) cout << ans + 1;     if (a == 1) cout << ans + 1;     if (a == 0) cout << ans;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.precision(20);     long long t = 1;     cin >> t;     while (t--) {       solve();       cout <<   n ;     }     cin.get();     return 0;   }   