func_code_string: #include <bits/stdc++.h>   using namespace std;   struct point {     int x, y, z;     double dist(point& p) {       return sqrt((double)((p.x - x) * (p.x - x) + (p.y - y) * (p.y - y) +                            (p.z - z) * (p.z - z)));     }   };   int N;   point P[5005];   double solve() {     double res = 1e10;     for (int i = 1; i < N; i++) {       for (int j = i + 1; j < N; j++) {         double per = P[i].dist(P[j]) + P[i].dist(P[0]) + P[j].dist(P[0]);         if (per < res) res = per;       }     }     return res / 2.0;   }   int main() {     while (cin >> N) {       for (int i = 0; i < N; i++) {         cin >> P[i].x >> P[i].y >> P[i].z;       }       cout << setprecision(12) << solve() << endl;     }   }   