func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 5;   int n, cnt, Max, head[N];   struct Edge {     int to, nxt, val;   } e[N << 1];   int read() {     int x = 0, flg = 1;     char c = getchar();     for (; !isdigit(c); c = getchar())       if (c ==  - ) flg = -1;     for (; isdigit(c); c = getchar()) x = x * 10 + c -  0 ;     return x * flg;   }   void add(int x, int y, int w) {     e[++cnt].to = y;     e[cnt].val = w;     e[cnt].nxt = head[x];     head[x] = cnt;   }   void dfs(int x, int fa, int dis) {     Max = max(Max, dis);     for (int i = head[x]; i; i = e[i].nxt) {       int u = e[i].to;       if (u == fa) continue;       dfs(u, x, dis + e[i].val);     }   }   int main() {     n = read();     int x, y, w;     long long sum = 0;     for (int i = 2; i <= n; ++i) {       x = read(), y = read(), w = read();       add(x, y, w);       add(y, x, w);       sum += 2 * w;     }     dfs(1, 0, 0);     printf( %lld n , sum - Max);     return 0;   }   