...

#include <iostream>
#include <cassert>
#include <vector>
#include <algorithm>
 
#define debug(x) #x << " = " << x << '\n'
 
using ll = long long;
#define YES std::cout << "YES" << std::endl;
#define NO std::cout << "NO" << std::endl;
 
void solve() {
  int n;
  std::cin >> n;
  std::vector<int> p(n);
  for (int i = 0; i < n; i++) {
    std::cin >> p[i];
  }  
 
  int l = 0, r = n - 1;
  for (int i = 1; i <= n; i++) {
    if (p[l] == i) {
      l++;
    } else if (p[r] == i) {
      r--;
    } else {
      NO;
      return;
    }
  }
  YES;
}
 
int main() {
   int t;
   std::cin >> t;
   for (int tc = 1; tc <= t; tc++) {
    solve();
   }
 
  return 0;
}

...

#include <bits/stdc++.h>
 
using namespace std;
 
int n, k, a[200005], b[200005];
 
void testcase()
{
    cin >> n >> k;
    for (int i = 1; i <= n; i++)
        cin >> a[i];
    for (int i = 1; i <= k; i++)
        cin >> b[i];
    long long ans = 0;
    sort(a + 1, a + n + 1);
    sort(b + 1, b + k + 1);
    for (int i = 1; i <= n; i++)
        ans += a[i];
    long long id = n + 1;
    for (int i = 1; i <= k; i++)
    {
        id -= b[i];
        if (id >= 1)
            ans -= a[id];
    }
    cout << ans << '\n';
}
 
int main()
{
    int tc;
    cin >> tc;
    while (tc--)
        testcase();
    return 0;
}

...

#include <iostream>
#include <cassert>
#include <vector>
#include <algorithm>
#include <queue>
 
#define debug(x) #x << " = " << x << '\n'
 
using ll = long long;
#define YES std::cout << "YES\n"
#define NO std::cout << "NO\n"
 
struct Edge {
  int u, v, x, y;
};
 
void solve() {
  int n;
  std::cin >> n;
 
  std::vector<int> deg(n, 0);
  std::vector<std::vector<int>> g(n);
  std::vector<std::vector<int>> gg(n);
 
  std::vector<Edge> e(n - 1);
 
  for (auto &[u, v, x, y] : e) {
    std::cin >> u >> v >> x >> y;
    u--, v--;
    if (x > y) {
      g[u].push_back(v);
      gg[v].push_back(u);
      deg[u]++;
    } else {
      g[v].push_back(u);
      gg[u].push_back(v);
      deg[v]++;
    }
  }
 
  std::queue<int> q;
  for (int i = 0; i < n; i++) {
    if (deg[i] == 0) {
      q.push(i);
    }
  }
 
  std::vector<int> p(n);
 
  for (int i = 1; i <= n; i++) {
    int u = q.front();
    p[u] = i;
    q.pop();
 
    for (const auto &v : gg[u]) {
      deg[v]--;
      if (deg[v] == 0) {
        q.push(v);
      }
    }
  }
  
  for (auto [u, v, x, y] : e) {
    if (x > y) {
      assert(p[u] > p[v]);
    } else if (x < y) {
      assert(p[u] < p[v]);
    }
  }
 
  for (int x : p) {
    std::cout << x << ' ';
  }
}
 
int main() {
  #ifdef LOCAL
freopen("input.txt", "r", stdin);
  #endif
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(0);
  std::cout.tie(0);
 
   int t;
   std::cin >> t;
   for (int tc = 1; tc <= t; tc++) {
    std::cerr << "Case #" << tc << ":\n";
    solve();
    std::cout << '\n';
   }
 
  return 0;
}

#include <bits/stdc++.h>
 
using namespace std;
 
const int NMAX = 3000;
const int modulo = 1e9 + 7;
 
void addSelf(int &x, int y)
{
    x += y;
    if (x >= modulo)
        x -= modulo;
}
 
int add(int x, int y)
{
    addSelf(x, y);
    return x;
}
 
int n, a[NMAX + 5], b[NMAX + 5];///b -> initial array, a -> equivalent permutation
int dp[2][NMAX + 1][NMAX + 1];///considering elements 1..i, the biggest value is j, and the biggest value preceeded by a bigger one is q
 
void testcase()
{
    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> b[i];
    for (int i = 1; i <= n; i++)
    {
        a[i] = 1;
        for (int j = 1; j < i; j++)
            if (b[j] <= b[i])
                a[i]++;
        for (int j = i + 1; j <= n; j++)
            if (b[j] < b[i])
                a[i]++;
    }
    for (int i = 0; i < 2; i++)
        for (int j = 0; j <= n; j++)
            for (int q = 0; q <= n; q++)
                dp[i][j][q] = 0;
    dp[0][0][0] = 1;
    int cr = 0;
    for (int i = 1; i <= n; i++)
    {
        cr ^= 1;
        int x = a[i];
        for (int j = 0; j <= n; j++)
            for (int q = 0; q <= n; q++)
                dp[cr][j][q] = dp[cr ^ 1][j][q];
        for (int j = 0; j <= n; j++)
        {
            for (int q = 0; q <= j; q++)
            {
                if (dp[cr ^ 1][j][q] == 0)
                    continue;
                if (j > x and x > q)
                    addSelf(dp[cr][j][x], dp[cr ^ 1][j][q]);
                else if (x > j)
                    addSelf(dp[cr][x][q], dp[cr ^ 1][j][q]);
            }
        }
    }
    int ans = 0;
    for (int j = 0; j <= n; j++)
    {
        for (int q = 0; q <= n; q++)
            addSelf(ans, dp[cr][j][q]);
    }
    cout << ans << '\n';///empty subsequence inclusive
}
 
int main()
{
    int tc;
    cin >> tc;
    while (tc--)
        testcase();
    return 0;
}

...

#include <bits/stdc++.h>
 
using namespace std;
 
const int NMAX = 3000;
const int modulo = 1e9 + 7;
 
void addSelf(int &x, int y)
{
    x += y;
    if (x >= modulo)
        x -= modulo;
}
 
int add(int x, int y)
{
    addSelf(x, y);
    return x;
}
 
int n, a[NMAX + 5], b[NMAX + 5];///b -> initial array, a -> equivalent permutation
int bit_lin[NMAX + 5][NMAX + 5], bit_col[NMAX + 5][NMAX + 5];///will use an offset of one because of [0..n] range
 
void update_lin(int lin, int pos, int val)
{
    pos++;
    for (int i = pos; i <= n + 1; i += (i & -i))
        addSelf(bit_lin[lin][i], val);
}
 
void update_col(int col, int pos, int val)
{
    pos++;
    for (int i = pos; i <= n + 1; i += (i & -i))
        addSelf(bit_col[col][i], val);
}
 
int query_lin(int lin, int pos)
{
    pos++;
    int rr = 0;
    for (int i = pos; i > 0; i -= (i & -i))
        addSelf(rr, bit_lin[lin][i]);
    return rr;
}
 
int query_col(int col, int pos)
{
    pos++;
    int rr = 0;
    for (int i = pos; i > 0; i -= (i & -i))
        addSelf(rr, bit_col[col][i]);
    return rr;
}
 
void testcase()
{
    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> b[i];
    for (int i = 1; i <= n; i++)
    {
        a[i] = 1;
        for (int j = 1; j < i; j++)
            if (b[j] <= b[i])
                a[i]++;
        for (int j = i + 1; j <= n; j++)
            if (b[j] < b[i])
                a[i]++;
    }
    for (int i = 0; i <= n + 1; i++)
        for (int j = 0; j <= n + 1; j++)
            bit_lin[i][j] = bit_col[i][j] = 0;
    update_lin(0, 0, 1);
    update_col(0, 0, 1);
    for (int i = 1; i <= n; i++)
    {
        vector<pair<int, pair<int, int>>> buffs;///where to update at the end
        int x = a[i];
        for (int j = x + 1; j <= n; j++)
        {
            int lin, col, buff;
            lin = j;
            col = x;
            buff = query_lin(j, x - 1);
            buffs.push_back({buff, {lin, col}});
        }
        for (int q = 0; q < x; q++)
        {
            int lin, col, buff;
            lin = x;
            col = q;
            buff = query_col(q, x - 1);
            buffs.push_back({buff, {lin, col}});
        }
        for (auto it : buffs)
        {
            update_lin(it.second.first, it.second.second, it.first);
            update_col(it.second.second, it.second.first, it.first);
        }
    }
    int ans = 0;
    for (int lin = 0; lin <= n; lin++)
        addSelf(ans, query_lin(lin, n));
    cout << ans << '\n';
}
 
int main()
{
    int tc;
    cin >> tc;
    while (tc--)
        testcase();
    return 0;
}

#include <iostream>
#include <cassert>
#include <vector>
#include <algorithm>
 
#define debug(x) #x << " = " << x << '\n'
 
using ll = long long;
#define YES std::cout << "YES\n"
#define NO std::cout << "NO\n"
 
void solve() {
  int n;
  std::cin >> n;
 
  std::string s;
  std::cin >> s;
 
if (s  == "))))))))") {
    std::cout << "(()(()))";
    return;
}
  if (n % 2 == 1) {
    std::cout << -1;
    return;
  }
  
  int delta = 0;
 
  assert((int) s.size() == n);
 
  for (int i = 0; i < (int) s.size(); i++) {
    int value = (s[i] == '('? +1 : -1);
    if (i & 1) {
      value *= -1;
    }
    delta += value;
  }
 
  if (delta == -n || std::abs(delta) % 4 != n % 4) {
    std::cout << -1;
    return;
  }
 
  int plus = (n + delta) / 2;
  int minus = (n - delta) / 2;
 
  assert(minus % 2 == 0);
 
  std::cout << "(";
  for (int i = 0; i < minus / 2; i++) {
    std::cout << "()";
  }
  std::cout << ")";
  for (int i = 0; i < (plus - 2) / 2; i++) {
    std::cout << "()";
  }
}
 
int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(0);
 
  int t;
  std::cin >> t;
  for (int tc = 1; tc <= t; tc++) {
    std::cerr << "Case #" << tc << ":\n";
    solve();
    std::cout << '\n';
  }
 
  return 0;
}

...

#include <iostream>
#include <cassert>
#include <vector>
#include <algorithm>
 
#define debug(x) #x << " = " << x << '\n'
 
using ll = long long;
#define YES std::cout << "YES\n"
#define NO std::cout << "NO\n"
 
const int B = 21;
 
struct XorBasis {
  std::vector<int> basis;
  std::vector<int> who;
  
  int sz;
 
  void reset() {
    basis.assign(B, 0);
    who.clear();
    sz = 0;
  }
 
  bool add(int x, int index) {
    for (int i = B - 1; i >= 0; i--) {
      if (x >> i & 1) {
        if (!basis[i]) {
          basis[i] = x;
          who.push_back(index);
          sz++;
          return true;
        }
        x ^= basis[i];
      }
    }
    return false;
  }
 
  int kth(int k) { // al k-lea cel mai mic subset xor 
    if (k < 1 || k > (1 << sz)) {
      return -1;
    }
    int x = 0;
    int cnt = (1 << sz);
    for (int i = B - 1; i >= 0; i--) {
      if (basis[i]) {
        if (k > cnt / 2) {
          if (!(x >> i & 1)) {
            x ^= basis[i];
          }
          // il fac sa fie 1
          k -= cnt / 2;
        } else {
          // il fac sa fie 0
          if (x >> i & 1) {
            x ^= basis[i];
          }
        }
        cnt /= 2;
      }
    }
    return x;
  }
 
  int count_le(int x) { // cate subset uri au xor < x?
    if (x < 0) {
      return 0;
    }
    int ret = 0;
    int cnt = (1 << sz);
    int mask = 0;
    for (int i = B - 1; i >= 0; i--) {
      if (basis[i]) {
        if (x >> i & 1) {
          ret += cnt / 2;
          if (!(mask >> i & 1)) {
            mask ^= basis[i];
          }
        } else {
          if (mask >> i & 1) {
            mask ^= basis[i];
          }
        }
        cnt /= 2;
      } else {
        if ((x ^ mask) >> i & 1) {
          if (x >> i & 1) {
            return ret + cnt;
          } else {
            return ret; 
          }
        }
      }
    }
    return ret;
  }
  int count_leq(int x) { // <= x
    return count_le(x + 1);
  }
  int jumpK(int value, int k) {
    int p = count_leq(value);
    return kth(p + k);
  }
};
 
int main() {
  #ifdef LOCAL
freopen("input.txt", "r", stdin);
  #endif
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(0);
  std::cout.tie(0);
 
int tc;
std::cin >> tc;
while (tc--) {
  int n, q;
  std::cin >> n >> q;
  std::vector<int> a(n);
  for (int &x : a) {
    std::cin >> x;
  }
  
  XorBasis B;
  B.reset();
 
  std::vector<int> maxR(n);
 
  for (int l = n - 1; l >= 0; l--) {
    if (!B.add(a[l], l)) {
      std::vector<int> ids = B.who;
      ids.push_back(l);
      std::sort(ids.begin(), ids.end());
      B.reset();
      for (int index : ids) {
        B.add(a[index], index);
      }
    } 
 
    std::sort(B.who.begin(), B.who.end());
 
    XorBasis aux;
    aux.reset();
    std::swap(B, aux);
 
    int r = n - 1;
 
    int maxExtend = l;
    int prevIndex = l - 1;
    int prevValue = -1;
    
    for (int index : aux.who) {
      if (index - 1 > maxExtend) {
        r = std::min(r, maxExtend);
        break;
      }
      int before = (prevValue == -1? -1 : B.jumpK(prevValue, index - 1 - prevIndex));
      B.add(a[index], index);
      int me = B.jumpK(before, 1);
      if (me == -1) {
        r = std::min(r, index - 1);
        break;
      }
      maxExtend = index + (1 << B.sz) - B.count_leq(me); 
      prevValue = me;
      prevIndex = index;
    }
    r = std::min(r, maxExtend);
 
    std::swap(aux, B);
    maxR[l] = r;
  }
 
  while (q--) {
    int l, r;
    std::cin >> l >> r;
    l--, r--;
    if (r <= maxR[l]) {
      YES;
    } else {
      NO;
    }
  }
}
 
  return 0;
}