func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MOD = 1e9 + 7;   double ed(double x1, double y1, double x2, double y2) {     return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));   }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     double ax, ay, bx, by, tx, ty;     int n;     cin >> ax >> ay >> bx >> by >> tx >> ty >> n;     double td = 0;     vector<pair<double, int>> p1(n), p2(n);     for (int i = 0; i < n; i++) {       int x, y;       cin >> x >> y;       td += 2 * ed(x, y, tx, ty);       p1[i] = {ed(x, y, ax, ay) - ed(x, y, tx, ty), i};       p2[i] = {ed(x, y, bx, by) - ed(x, y, tx, ty), i};     }     sort(p1.begin(), p1.end());     sort(p2.begin(), p2.end());     double ans = min(td + p1[0].first, td + p2[0].first);     if (n == 1) {       cout << setprecision(12) << ans;       return 0;     }     if (p1[0].second != p2[0].second) {       ans = min(ans, td + p1[0].first + p2[0].first);     } else {       ans = min(ans, min(td + p1[0].first + p2[1].first,                          td + p1[1].first + p2[0].first));     }     cout << setprecision(12) << ans;     return 0;   }   