func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, q, a[210000], b[210000];   int tree[210000];   char Getchar() {     static char now[1 << 20], *S, *T;     if (T == S) {       T = (S = now) + fread(now, 1, 1 << 20, stdin);       if (T == S) return EOF;     }     return *S++;   }   int read() {     int x = 0, f = 1;     char ch = Getchar();     while (ch <  0  || ch >  9 ) {       if (ch ==  - ) f = -1;       ch = Getchar();     }     while (ch <=  9  && ch >=  0 ) x = x * 10 + ch -  0 , ch = Getchar();     return x * f;   }   void update(int x, int y) {     for (; x <= n; x += x & -x) tree[x] ^= y;   }   int getnum(int x) {     int res = 0;     for (; x; x -= x & -x) res ^= tree[x];     return res;   }   struct Linear_Basis {     int cnt, v[30];     void clr() {       cnt = 0;       memset(v, 0, sizeof(v));     }     void ins(int x, int lim = 29) {       if (cnt == 30) return;       for (int i = lim; i >= 0 && x; i--)         if (x & (1 << i)) {           if (v[i])             x ^= v[i];           else {             v[i] = x;             cnt++;             break;           }         }     }     void merge(const Linear_Basis &a) {       for (int i = 29; i >= 0; i--)         if (a.v[i]) ins(a.v[i], i);     }   } tmp, t[810000];   void pushup(int now) {     t[now] = t[now << 1];     t[now].merge(t[now << 1 | 1]);   }   void build(int now, int l, int r) {     if (l == r) {       t[now].clr();       t[now].ins(b[l]);       return;     }     int mid = (l + r) >> 1;     build(now << 1, l, mid);     build(now << 1 | 1, mid + 1, r);     pushup(now);   }   void change(int now, int l, int r, int x) {     if (l == r) {       t[now].clr();       t[now].ins(b[l]);       return;     }     int mid = (l + r) >> 1;     if (x <= mid)       change(now << 1, l, mid, x);     else       change(now << 1 | 1, mid + 1, r, x);     pushup(now);   }   void query(int now, int l, int r, int x, int y) {     if (l == x && r == y) {       tmp.merge(t[now]);       return;     }     int mid = (l + r) >> 1;     if (y <= mid)       query(now << 1, l, mid, x, y);     else if (x > mid)       query(now << 1 | 1, mid + 1, r, x, y);     else {       query(now << 1, l, mid, x, mid);       query(now << 1 | 1, mid + 1, r, mid + 1, y);     }   }   int main() {     n = read();     q = read();     for (int i = 1; i <= n; i++) {       a[i] = read();       b[i] = a[i - 1] ^ a[i];       update(i, b[i]);     }     build(1, 1, n);     int op, l, r, x;     while (q--) {       op = read();       l = read();       r = read();       if (op == 1) {         x = read();         update(l, x);         update(r + 1, x);         b[l] ^= x;         b[r + 1] ^= x;         change(1, 1, n, l);         if (r < n) change(1, 1, n, r + 1);       } else {         tmp.clr();         tmp.ins(getnum(l));         if (l < r) query(1, 1, n, l + 1, r);         printf( %d n , 1 << tmp.cnt);       }     }     return 0;   }   