func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m;   struct point {     double x, y, z;   } P[5200];   inline double sqr(double x) { return x * x; }   inline double dist(point a, point b) {     return sqrt(sqr(a.x - b.x) + sqr(a.y - b.y) + sqr(a.z - b.z));   }   inline double len(point a, point b, point c) {     return dist(a, b) + dist(a, c) + dist(b, c);   }   int main() {     cin >> n;     double ans = 1e100;     for (int i = 0; i < n; i++) cin >> P[i].x >> P[i].y >> P[i].z;     for (int i = 1; i < n; i++)       for (int j = i + 1; j < n; j++) ans = min(ans, len(P[0], P[i], P[j]));     cout.precision(11);     cout << ans / 2 << endl;   }   