func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAXN = 4e5 + 5;   const int MAXQ = 5e5 + 5;   const int MAXP = 8e6 + 5;   template <typename T>   void chkmax(T &x, T y) {     x = max(x, y);   }   template <typename T>   void chkmin(T &x, T y) {     x = min(x, y);   }   template <typename T>   void read(T &x) {     x = 0;     int f = 1;     char c = getchar();     for (; !isdigit(c); c = getchar())       if (c ==  - ) f = -f;     for (; isdigit(c); c = getchar()) x = x * 10 + c -  0 ;     x *= f;   }   template <typename T>   void write(T x) {     if (x < 0) x = -x, putchar( - );     if (x > 9) write(x / 10);     putchar(x % 10 +  0 );   }   template <typename T>   void writeln(T x) {     write(x);     puts(  );   }   struct SegmentTreeMerging {     struct Node {       int lc, rc, sum;       bool leaf;     } a[MAXP];     int size, n;     void init(int x) {       n = x;       size = 0;     }     void update(int root) { a[root].sum = a[a[root].lc].sum + a[a[root].rc].sum; }     void modify(int &root, int l, int r, int pos, int d) {       if (root == 0) root = ++size;       if (l == r) {         a[root].sum += d;         a[root].leaf = true;         return;       }       int mid = (l + r) / 2;       if (mid >= pos)         modify(a[root].lc, l, mid, pos, d);       else         modify(a[root].rc, mid + 1, r, pos, d);       update(root);     }     void modify(int &root, int val, int d) { modify(root, 1, n, val, d); }     int merge(int x, int y) {       if (x == 0 || y == 0) return x + y;       if (a[x].leaf) {         a[x].sum += a[y].sum;         return x;       }       a[x].lc = merge(a[x].lc, a[y].lc);       a[x].rc = merge(a[x].rc, a[y].rc);       update(x);       return x;     }     void join(int &to, int from) { to = merge(to, from); }     int query(int root, int l, int r, int ql, int qr) {       if (root == 0) return 0;       if (l == ql && r == qr) return a[root].sum;       int mid = (l + r) / 2, ans = 0;       if (mid >= ql) ans += query(a[root].lc, l, mid, ql, min(mid, qr));       if (mid + 1 <= qr)         ans += query(a[root].rc, mid + 1, r, max(mid + 1, ql), qr);       return ans;     }     int query(int root, int l, int r) { return query(root, 1, n, l, r); }   } ST;   struct SuffixAutomaton {     struct Node {       int child[26];       int father, depth;     } a[MAXN];     vector<int> e[MAXN];     vector<int> home[MAXN];     vector<pair<int, int>> s[MAXN];     int n, root, size, last;     int newnode(int dep) {       a[++size].depth = dep;       return size;     }     void init() {       size = 0;       root = last = 0;     }     void extend(int ch) {       int p = last, np;       if (a[p].child[ch]) {         int q = a[p].child[ch];         if (a[p].depth + 1 == a[q].depth)           np = q;         else {           np = newnode(a[p].depth + 1);           memcpy(a[np].child, a[q].child, sizeof(a[q].child));           a[np].father = a[q].father;           a[q].father = np;           while (a[p].child[ch] == q) {             a[p].child[ch] = np;             p = a[p].father;           }         }       } else {         np = newnode(a[p].depth + 1);         while (a[p].child[ch] == 0) {           a[p].child[ch] = np;           p = a[p].father;         }         if (a[p].child[ch] == np)           a[np].father = root;         else {           int q = a[p].child[ch];           if (a[q].depth == a[p].depth + 1)             a[np].father = q;           else {             int nq = newnode(a[p].depth + 1);             memcpy(a[nq].child, a[q].child, sizeof(a[q].child));             a[nq].father = a[q].father;             a[q].father = a[np].father = nq;             while (a[p].child[ch] == q) {               a[p].child[ch] = nq;               p = a[p].father;             }           }         }       }       last = np;     }     void insert(char *s) {       last = 0, n++;       int len = strlen(s + 1);       for (int i = 1; i <= len; i++) {         extend(s[i] -  a );         home[n].push_back(last);       }     }     int rt[MAXN], ans[MAXQ];     vector<pair<pair<int, int>, int>> q[MAXN];     void work(int pos) {       for (auto x : s[pos]) ST.modify(rt[pos], x.first, x.second);       for (auto x : e[pos]) {         work(x);         ST.join(rt[pos], rt[x]);       }       for (auto x : q[pos])         ans[x.second] = ST.query(rt[pos], x.first.first, x.first.second);     }     void solve(int m) {       for (int i = 1; i <= size; i++) e[a[i].father].push_back(i);       for (int i = 1; i <= n; i++)         for (unsigned j = 0; j < home[i].size(); j++)           s[home[i][j]].emplace_back(i, 1);       work(0);       for (int i = 1; i <= m; i++) writeln(ans[i]);     }   } SAM;   char s[MAXN];   int main() {     int n, m;     read(n), read(m);     SAM.init(), ST.init(n);     for (int i = 1; i <= n; i++) {       scanf(  n%s , s + 1);       SAM.insert(s);     }     for (int i = 1; i <= m; i++) {       int l, r, k;       read(l), read(r), read(k);       SAM.q[SAM.home[k].back()].emplace_back(make_pair(l, r), i);     }     SAM.solve(m);     return 0;   }   