func_code_string: #include <bits/stdc++.h>   using namespace std;   const int oo = 1e9;   int n, q;   int a[400005];   struct rmq {     int tree[1050000], lim;     void init(int n) {       memset(tree, 0, sizeof(tree));       for (lim = 1; lim <= n; lim <<= 1)         ;     }     void add(int x, int v) {       x += lim;       tree[x] = max(tree[x], v);       while (x > 1) {         x >>= 1;         tree[x] = max(tree[2 * x], tree[2 * x + 1]);       }     }     int query(int s, int e) {       s += lim;       e += lim;       int ret = 0;       while (s < e) {         if (s % 2 == 1) ret = max(ret, tree[s++]);         if (e % 2 == 0) ret = max(ret, tree[e--]);         s >>= 1;         e >>= 1;       }       if (s == e) ret = max(ret, tree[s]);       return ret;     }   } rmq;   int dpl[400005], dpr[400005], lis;   int cnt[400005];   bool check_indep(int x) {     return cnt[dpr[x]] != 1 || dpl[x] + dpr[x] != lis + 1;   }   int is_indep[400005];   int aux[400005], ret[400005];   struct query {     int x, y, idx;     bool operator<(const query &q) const { return x < q.x; }   };   int main() {     scanf( %d %d , &n, &q);     vector<int> v;     for (int i = 1; i <= n; i++) {       scanf( %d , &a[i]);       v.push_back(a[i]);     }     sort(v.begin(), v.end());     v.resize(unique(v.begin(), v.end()) - v.begin());     for (int i = 1; i <= n; i++) {       a[i] = lower_bound(v.begin(), v.end(), a[i]) - v.begin() + 1;     }     rmq.init(n);     for (int i = 1; i <= n; i++) {       dpl[i] = rmq.query(1, a[i] - 1) + 1;       rmq.add(a[i], dpl[i]);     }     rmq.init(n);     for (int i = n; i; i--) {       dpr[i] = rmq.query(a[i] + 1, n) + 1;       rmq.add(a[i], dpr[i]);     }     for (int i = 1; i <= n; i++) {       lis = max(lis, dpl[i]);     }     for (int i = 1; i <= n; i++) {       if (dpl[i] + dpr[i] == lis + 1) {         cnt[dpr[i]]++;       }     }     for (int i = 1; i <= n; i++) {       is_indep[i] = check_indep(i);     }     vector<query> qr;     for (int i = 0; i < q; i++) {       int x, y;       scanf( %d %d , &x, &y);       if (is_indep[x]) {         ret[i] = lis;       } else         ret[i] = lis - 1;       qr.push_back({x, y, i});     }     sort(qr.begin(), qr.end());     rmq.init(n);     int pnt = 1;     for (int i = 0; i < q; i++) {       while (pnt <= n && pnt < qr[i].x) {         rmq.add(a[pnt], dpl[pnt]);         pnt++;       }       int sy = lower_bound(v.begin(), v.end(), qr[i].y) - v.begin();       aux[qr[i].idx] += rmq.query(1, sy);     }     pnt = n;     rmq.init(n);     for (int i = q - 1; i >= 0; i--) {       while (pnt && pnt > qr[i].x) {         rmq.add(a[pnt], dpr[pnt]);         pnt--;       }       int ey = upper_bound(v.begin(), v.end(), qr[i].y) - v.begin() + 1;       aux[qr[i].idx] += rmq.query(ey, n);     }     for (int i = 0; i < q; i++) {       ret[i] = max(ret[i], aux[i] + 1);       printf( %d n , ret[i]);     }   }   