func_code_string: #include <bits/stdc++.h>   using namespace std;   int sqrt_maxn = 505;   const int maxsqrt_n = 205;   const int maxn = 100005;   int a[maxn];   struct node {     int val;     node* next;     node* front;   };   node* front[maxsqrt_n];   node* rail[maxsqrt_n];   int dp[maxsqrt_n][maxn];   node* new_node() {     static node a[200005];     static int top = 0;     return &a[top++];   }   void insert_node(int x, int y) {     node* t = new_node();     t->val = y;     t->next = front[x];     if (front[x] != 0) front[x]->front = t;     t->front = 0;     front[x] = t;   }   void trans_inside(int x, int y) {     register int j = x / sqrt_maxn;     register int i;     register node* t1 = front[j];     for (i = j * sqrt_maxn; i <= x; i++) {       t1 = t1->next;     }     register node* t2 = t1;     for (; i <= y; i++) {       t2 = t2->next;     }     t1->front->next = t2;     t2->front->next = t2->next;     t2->next->front = t2->front;     t2->front = t1->front;     t2->next = t1;     t1->front = t2;   }   void trans(int x, int y) {     register int jx = x / sqrt_maxn;     register int i;     register node* t1 = front[jx];     for (i = jx * sqrt_maxn; i <= x; i++) {       t1 = t1->next;     }     int jy = y / sqrt_maxn;     register node* t2 = front[jy];     for (i = jy * sqrt_maxn; i <= y; i++) {       t2 = t2->next;     }     t1->front->next = t2;     t2->front->next = t2->next;     t2->next->front = t2->front;     t2->front = t1->front;     t2->next = t1;     t1->front = t2;     dp[jx][t2->val]++;     dp[jy][t2->val]--;     for (i = jx; i < jy; i++) {       t1 = front[i + 1]->next;       t2 = rail[i]->front;       t1->front->next = t2;       t2->front->next = t2->next;       t2->next->front = t2->front;       t2->front = t1->front;       t2->next = t1;       t1->front = t2;       dp[i + 1][t2->val]++;       dp[i][t2->val]--;     }   }   int calc_inside(int x, int y, int val) {     int j = x / sqrt_maxn;     int i;     node* t1 = front[j];     for (i = j * sqrt_maxn; i <= x; i++) {       t1 = t1->next;     }     register int ans = 0;     for (; i <= y; i++) {       if (t1->val == val) ans++;       t1 = t1->next;     }     if (t1->val == val) ans++;     return ans;   }   int calc(int x, int y, int val) {     int j = x / sqrt_maxn;     int i;     node* t1 = front[j];     for (i = j * sqrt_maxn; i <= x; i++) {       t1 = t1->next;     }     int ans = 0;     for (; t1->val != -2;) {       if (t1->val == val) ans++;       t1 = t1->next;     }     int jy = y / sqrt_maxn;     for (i = j + 1; i < jy; i++) {       ans += dp[i][val];     }     t1 = front[jy];     for (i = jy * sqrt_maxn; i <= y; i++) {       t1 = t1->next;       if (t1->val == val) ans++;     }     return ans;   }   int main() {     fprintf(stderr,  %d n , clock());     int n;     scanf( %d , &n);     int i;     for (i = 0; i < n; i++) {       scanf( %d , &a[i]);       a[i]--;     }     memset(dp, 0, sizeof(dp));     for (i = 0; i < n; i += sqrt_maxn) {       register int temp = i / sqrt_maxn;       front[temp] = 0;       int j;       insert_node(temp, -2);       rail[temp] = front[temp];       for (j = i + sqrt_maxn - 1; j >= i; j--) {         if (j >= n) continue;         insert_node(temp, a[j]);         dp[temp][a[j]]++;       }       insert_node(temp, -1);     }     int lastans = 0;     int q;     scanf( %d , &q);     for (i = 0; i < q; i++) {       int oper;       scanf( %d , &oper);       if (oper == 1) {         int x, y;         scanf( %d%d , &x, &y);         x = (x - 1 + lastans) % n;         y = (y - 1 + lastans) % n;         if (x > y) swap(x, y);         if (x == y) continue;         if (x / sqrt_maxn == y / sqrt_maxn) {           trans_inside(x, y);         } else {           trans(x, y);         }       } else {         int x, y, z;         scanf( %d%d%d , &x, &y, &z);         x = (x - 1 + lastans) % n;         y = (y - 1 + lastans) % n;         z = (z - 1 + lastans) % n;         if (x > y) swap(x, y);         if (x / sqrt_maxn == y / sqrt_maxn) {           lastans = calc_inside(x, y, z);         } else {           lastans = calc(x, y, z);         }         printf( %d n , lastans);       }     }     fprintf(stderr,  %d n , clock());     return 0;   }   