func_code_string: #include <bits/stdc++.h>   using namespace std;   const int inf = 0x3f3f3f3f;   inline int Read() {     int x = 0, f = 1;     char c = getchar();     while (c >  9  || c <  0 ) {       if (c ==  - ) f = -1;       c = getchar();     }     while (c >=  0  && c <=  9 ) {       x = x * 10 + c -  0 ;       c = getchar();     }     return x * f;   }   struct EDGE {     int from, to, w, next;   } E[400005];   int n, m;   int HEAD[200005];   int dep[200005], CENT;   int pa[200005][50], maxx[200005][50];   void ADD(int from, int to, int w) {     E[CENT].from = from;     E[CENT].to = to;     E[CENT].w = w;     E[CENT].next = HEAD[from];     HEAD[from] = CENT++;   }   void DFS(int u, int f) {     pa[u][0] = f;     for (int i = HEAD[u]; i != -1; i = E[i].next) {       int to = E[i].to;       if (to != f) {         dep[to] = dep[u] + 1;         maxx[to][0] = E[i].w;         DFS(to, u);       }     }   }   int maxh;   void deal() {     int j;     for (j = 1; (1 << j) < n; j++)       for (int i = 1; i <= n; i++) {         int t = pa[i][j - 1];         pa[i][j] = pa[pa[i][j - 1]][j - 1];         maxx[i][j] = max(maxx[i][j - 1], maxx[t][j - 1]);       }     maxh = j - 1;   }   int swim(int x, int k, int &ma) {     ma = 0;     for (int i = 0; i <= maxh; i++) {       if (k >> i & 1) {         ma = max(ma, maxx[x][i]);         x = pa[x][i];       }     }     return x;   }   int LCA(int x, int y) {     if (dep[x] > dep[y]) swap(x, y);     int ans = 0;     y = swim(y, dep[y] - dep[x], ans);     if (x == y) return ans;     for (int i = maxh; i >= 0; i--) {       if (pa[x][i] != pa[y][i]) {         ans = max(ans, max(maxx[x][i], maxx[y][i]));         x = pa[x][i], y = pa[y][i];       }     }     return max(ans, max(maxx[x][0], maxx[y][0]));   }   const int N = 200005;   struct edge {     int from, to, w, next;     int ty;     bool operator<(const edge a) const { return w < a.w; }   };   int pre[N], head[N];   int cnt;   edge e[200005 + 5];   void add(int from, int to, int w) {     e[cnt].from = from;     e[cnt].to = to;     e[cnt].w = w;     e[cnt].next = head[from];     e[cnt].ty = 0;     head[from] = cnt++;   }   int find(int x) {     if (x == pre[x]) return x;     return pre[x] = find(pre[x]);   }   void Kruskal() {     for (int i = 1; i <= n; ++i) pre[i] = i;     sort(e, e + cnt);     for (int i = 0; i < cnt; ++i) {       int u = find(e[i].from);       int v = find(e[i].to);       if (u != v) {         pre[u] = v;         ADD(e[i].from, e[i].to, e[i].w);         ADD(e[i].to, e[i].from, e[i].w);         e[i].ty = 1;       }     }   }   int main() {     while (scanf( %d %d , &n, &m) != EOF) {       CENT = cnt = 0;       for (int i = 1; i <= n; i++) head[i] = HEAD[i] = -1;       for (int i = 1; i <= m; i++) {         int u = Read(), v = Read(), w = Read();         add(u, v, w);       }       Kruskal();       DFS(1, -1);       deal();       int ans = 0;       for (int i = 0; i < cnt; i++) {         if (!e[i].ty) {           int u = e[i].from, v = e[i].to;           int minn = LCA(u, v);           if (minn == e[i].w) ans++;         }       }       printf( %d n , ans);     }     return 0;   }   