func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:1024000000,1024000000 )   using namespace std;   const int mxn = 400005, maxnn = 100005;   const int mod = 1e9 + 7;   long long ans;   int n, m, num, cir, r, cnt;   int head[maxnn], que[maxnn];   struct edge {     int to, next;     long long w;   } f[mxn << 2];   long long p[70], circle[mxn], dis[maxnn], dig[2], pw[105];   inline void add(int u, int v, long long w) {     f[++cnt].to = v, f[cnt].w = w, f[cnt].next = head[u], head[u] = cnt;   }   inline void dfs(int u, int fa, long long now) {     dis[u] = now, que[++num] = u;     for (int i = head[u]; i; i = f[i].next) {       int v = f[i].to;       if (v == fa) continue;       if (dis[v] == -1)         dfs(v, u, dis[u] ^ f[i].w);       else         circle[++cir] = dis[u] ^ dis[v] ^ f[i].w;     }   }   inline void init() {     int i, j;     r = 0;     memset(p, 0, sizeof p);     for (i = 1; i <= cir; i++) {       long long x = circle[i];       for (j = 62; j >= 0; j--) {         if (!(x >> j)) continue;         if (!p[j]) {           p[j] = x;           break;         }         x ^= p[j];       }     }     for (j = 0; j <= 62; j++)       if (p[j]) r++;   }   inline void calc() {     init();     int i, j;     for (j = 0; j <= 62; j++) {       bool flag = 0;       dig[0] = dig[1] = 0;       for (i = 1; i <= num; i++) dig[(dis[que[i]] >> j) & 1]++;       for (i = 0; i <= 62; i++)         if ((p[i] >> j) & 1) {           flag = 1;           break;         }       long long now =           (dig[0] * (dig[0] - 1) / 2 + dig[1] * (dig[1] - 1) / 2) % mod;       if (flag) {         if (r) now = now * pw[r - 1] % mod;         now = now * pw[j] % mod;         ans = (ans + now) % mod;       }       now = dig[0] * dig[1] % mod;       if (flag) {         if (r) now = now * pw[r - 1] % mod;       } else         now = now * pw[r] % mod;       now = now * pw[j] % mod;       ans = (ans + now) % mod;     }   }   int main() {     int i, j, u, v;     long long w;     memset(dis, -1, sizeof dis);     pw[0] = 1;     for (j = 1; j <= 100; j++) pw[j] = pw[j - 1] * 2 % mod;     scanf( %d%d , &n, &m);     for (i = 1; i <= m; i++) {       scanf( %d%d%lld , &u, &v, &w);       add(u, v, w), add(v, u, w);     }     for (i = 1; i <= n; i++)       if (dis[i] == -1) {         num = cir = 0;         dfs(i, 0, 0);         calc();       }     printf( %lld , ans);     return 0;   }   