func_code_string: #include <bits/stdc++.h>   using namespace std;   int B, n, m;   int li[500008], ri[500008], mx[500008], tag[500008];   short g[480][100008];   int bel[500008], de[500008], ai[500008], pa[500008];   short size[500008];   int find(int x) {     if (pa[x] == x) return x;     return pa[x] = find(pa[x]);   }   void link(int x, int y) {     if (x == y) return;     if (size[x] > size[y]) swap(x, y);     pa[x] = y;     size[y] += size[x];   }   int tot;   int lst[500008], stamp[500008];   void makeup(int id) {     ++tot;     mx[id] = 0;     for (int i = li[id]; i <= ri[id]; i++) pa[i] = i, size[i] = 1;     for (int i = li[id]; i <= ri[id]; i++) {       int x = ai[i];       mx[id] = max(mx[id], x);       if (stamp[x] != tot)         stamp[x] = tot, g[id][x] = lst[x] = i - li[id];       else         link(i, g[id][x] + li[id]), g[id][x] = find(g[id][x] + li[id]) - li[id];     }   }   void pushdown(int id) {     for (int i = li[id]; i <= ri[id]; i++) g[id][ai[i]] = -1;     for (int i = li[id]; i <= ri[id]; i++) {       g[id][ai[i] + de[i]] = -1;       if (find(i) == i) ai[i] = ai[i] + de[i] - tag[id];       de[i] = 0;     }     for (int i = li[id]; i <= ri[id]; i++) ai[i] = ai[find(i)];     tag[id] = 0;   }   void refresh(int id) {     while (-1 == g[id][mx[id]]) mx[id]--;   }   int cnt = 0;   void subtract(int id, int x) {     if (mx[id] - tag[id] <= x) return;     if (mx[id] - tag[id] > x * 2 + 1 and 1) {       for (int i = tag[id] + 1; i <= x + tag[id]; i++)         if (g[id][i] != -1) {           int j = i + x;           de[g[id][i] + li[id]] += x;           if (g[id][j] != -1)             link(g[id][i] + li[id], g[id][j] + li[id]),                 g[id][j] = find(g[id][j] + li[id]) - li[id];           else             g[id][j] = g[id][i];           g[id][i] = -1;         }       tag[id] += x;     } else {       for (int i = x + 1 + tag[id]; i <= mx[id]; i++)         if (g[id][i] != -1) {           int j = i - x;           de[g[id][i] + li[id]] -= x;           if (g[id][j] != -1)             link(g[id][j] + li[id], g[id][i] + li[id]),                 g[id][j] = find(g[id][j] + li[id]) - li[id];           else             g[id][j] = g[id][i];           g[id][i] = -1;         }       refresh(id);     }   }   int ask(int id, int x) {     if (x + tag[id] > 100001) return 0;     if (g[id][x + tag[id]] == -1) return 0;     g[id][x + tag[id]] = find(g[id][x + tag[id]] + li[id]) - li[id];     return size[g[id][x + tag[id]] + li[id]];   }   signed main() {     memset(g, -1, sizeof g);     scanf( %d%d , &n, &m);     for (int i = 1; i <= n; i++) scanf( %d , &ai[i]);     B = sqrt(n);     B = max(B, n / 475);     memset(li, 0x3f, sizeof li);     for (int i = 1; i <= n; i++) {       bel[i] = i / B;       li[bel[i]] = min(li[bel[i]], i);       ri[bel[i]] = i;     }     for (int i = 0; i <= n / B; i++) makeup(i);     while (m--) {       int op, l, r, x;       scanf( %d%d%d%d , &op, &l, &r, &x);       if (op == 1) {         if (bel[l] == bel[r]) {           pushdown(bel[l]);           for (int i = l; i <= r; i++)             if (ai[i] > x) ai[i] -= x;           makeup(bel[l]);         } else {           pushdown(bel[l]);           for (int i = l; i <= ri[bel[l]]; i++)             if (ai[i] > x) ai[i] -= x;           pushdown(bel[r]);           for (int i = li[bel[r]]; i <= r; i++)             if (ai[i] > x) ai[i] -= x;           makeup(bel[l]);           makeup(bel[r]);           for (int i = bel[l] + 1; i < bel[r]; i++) subtract(i, x);         }       } else {         int ans = 0;         if (bel[l] == bel[r]) {           pushdown(bel[l]);           for (int i = l; i <= r; i++)             if (ai[i] == x) ans++;           makeup(bel[l]);           printf( %d n , ans);         } else {           pushdown(bel[l]);           for (int i = l; i <= ri[bel[l]]; i++) ans += (ai[i] == x);           pushdown(bel[r]);           for (int i = li[bel[r]]; i <= r; i++) ans += (ai[i] == x);           makeup(bel[l]);           makeup(bel[r]);           for (int i = bel[l] + 1; i < bel[r]; i++) ans += ask(i, x);           printf( %d n , ans);         }       }       ++cnt;       if (cnt < -7) {         for (int i = 0; i <= n / B; i++) pushdown(i);         for (int i = 1; i <= n; i++) cout << ai[i] <<    ;         cout << g[2][30] <<  : n n ;         for (int i = 0; i <= n / B; i++) makeup(i);       }     }     return 0;   }   