#include "towers.h"

#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <limits>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;

using Int = long long;

template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; }
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
#define COLOR(s) ("\x1b[" s "m")


struct Set {
  // max{ceil(log_64(n)), 1}
  int log64N, n;
  vector<unsigned long long> a[6];
  explicit Set(int n_ = 0) : n(n_) {
    assert(n >= 0);
    int m = n ? n : 1;
    for (int d = 0; ; ++d) {
      m = (m + 63) >> 6;
      a[d].assign(m, 0);
      if (m == 1) {
        log64N = d + 1;
        break;
      }
    }
  }
  bool empty() const {
    return !a[log64N - 1][0];
  }
  bool contains(int x) const {
    return (a[0][x >> 6] >> (x & 63)) & 1;
  }
  void insert(int x) {
    for (int d = 0; d < log64N; ++d) {
      const int q = x >> 6, r = x & 63;
      a[d][q] |= 1ULL << r;
      x = q;
    }
  }
  void erase(int x) {
    for (int d = 0; d < log64N; ++d) {
      const int q = x >> 6, r = x & 63;
      if ((a[d][q] &= ~(1ULL << r))) break;
      x = q;
    }
  }
  // max s.t. <= x (or -1)
  int prev(int x) const {
    if (x > n - 1) x = n - 1;
    for (int d = 0; d <= log64N; ++d) {
      if (x < 0) break;
      const int q = x >> 6, r = x & 63;
      const unsigned long long lower = a[d][q] << (63 - r);
      if (lower) {
        x -= __builtin_clzll(lower);
        for (int e = d; --e >= 0; ) x = x << 6 | (63 - __builtin_clzll(a[e][x]));
        return x;
      }
      x = q - 1;
    }
    return -1;
  }
  // min s.t. >= x (or n)
  int next(int x) const {
    if (x < 0) x = 0;
    for (int d = 0; d < log64N; ++d) {
      const int q = x >> 6, r = x & 63;
      if (static_cast<unsigned>(q) >= a[d].size()) break;
      const unsigned long long upper = a[d][q] >> r;
      if (upper) {
        x += __builtin_ctzll(upper);
        for (int e = d; --e >= 0; ) x = x << 6 | __builtin_ctzll(a[e][x]);
        return x;
      }
      x = q + 1;
    }
    return n;
  }
};

////////////////////////////////////////////////////////////////////////////////


// T: monoid representing information of an interval.
//   T()  should return the identity.
//   T(S s)  should represent a single element of the array.
//   T::pull(const T &l, const T &r)  should pull two intervals.
template <class T> struct SegmentTreePoint {
  int logN, n;
  vector<T> ts;
  SegmentTreePoint() : logN(0), n(0) {}
  explicit SegmentTreePoint(int n_) {
    for (logN = 0, n = 1; n < n_; ++logN, n <<= 1) {}
    ts.resize(n << 1);
  }
  template <class S> explicit SegmentTreePoint(const vector<S> &ss) {
    const int n_ = ss.size();
    for (logN = 0, n = 1; n < n_; ++logN, n <<= 1) {}
    ts.resize(n << 1);
    for (int i = 0; i < n_; ++i) at(i) = T(ss[i]);
    build();
  }
  T &at(int i) {
    return ts[n + i];
  }
  void build() {
    for (int u = n; --u; ) pull(u);
  }

  inline void pull(int u) {
    ts[u].pull(ts[u << 1], ts[u << 1 | 1]);
  }

  // Changes the value of point a to s.
  template <class S> void change(int a, const S &s) {
    assert(0 <= a); assert(a < n);
    ts[a += n] = T(s);
    for (; a >>= 1; ) pull(a);
  }

  // Applies T::f(args...) to point a.
  template <class F, class... Args>
  void ch(int a, F f, Args &&... args) {
    assert(0 <= a); assert(a < n);
    (ts[a += n].*f)(args...);
    for (; a >>= 1; ) pull(a);
  }

  // Calculates the product for [a, b).
  T get(int a, int b) {
    assert(0 <= a); assert(a <= b); assert(b <= n);
    if (a == b) return T();
    a += n; b += n;
    T prodL, prodR, t;
    for (int aa = a, bb = b; aa < bb; aa >>= 1, bb >>= 1) {
      if (aa & 1) { t.pull(prodL, ts[aa++]); prodL = t; }
      if (bb & 1) { t.pull(ts[--bb], prodR); prodR = t; }
    }
    t.pull(prodL, prodR);
    return t;
  }

  // Calculates T::f(args...) of a monoid type for [a, b).
  //   op(-, -)  should calculate the product.
  //   e()  should return the identity.
  template <class Op, class E, class F, class... Args>
#if __cplusplus >= 201402L
  auto
#else
  decltype((std::declval<T>().*F())())
#endif
  get(int a, int b, Op op, E e, F f, Args &&... args) {
    assert(0 <= a); assert(a <= b); assert(b <= n);
    if (a == b) return e();
    a += n; b += n;
    auto prodL = e(), prodR = e();
    for (int aa = a, bb = b; aa < bb; aa >>= 1, bb >>= 1) {
      if (aa & 1) prodL = op(prodL, (ts[aa++].*f)(args...));
      if (bb & 1) prodR = op((ts[--bb].*f)(args...), prodR);
    }
    return op(prodL, prodR);
  }

  // Find min b s.t. T::f(args...) returns true,
  // when called for the partition of [a, b) from left to right.
  //   Returns n + 1 if there is no such b.
  template <class F, class... Args>
  int findRight(int a, F f, Args &&... args) {
    assert(0 <= a); assert(a <= n);
    if ((T().*f)(args...)) return a;
    if (a == n) return n + 1;
    a += n;
    for (; ; a >>= 1) if (a & 1) {
      if ((ts[a].*f)(args...)) {
        for (; a < n; ) {
          if (!(ts[a <<= 1].*f)(args...)) ++a;
        }
        return a - n + 1;
      }
      ++a;
      if (!(a & (a - 1))) return n + 1;
    }
  }

  // Find max a s.t. T::f(args...) returns true,
  // when called for the partition of [a, b) from right to left.
  //   Returns -1 if there is no such a.
  template <class F, class... Args>
  int findLeft(int b, F f, Args &&... args) {
    assert(0 <= b); assert(b <= n);
    if ((T().*f)(args...)) return b;
    if (b == 0) return -1;
    b += n;
    for (; ; b >>= 1) if ((b & 1) || b == 2) {
      if ((ts[b - 1].*f)(args...)) {
        for (; b <= n; ) {
          if (!(ts[(b <<= 1) - 1].*f)(args...)) --b;
        }
        return b - n - 1;
      }
      --b;
      if (!(b & (b - 1))) return -1;
    }
  }
};

////////////////////////////////////////////////////////////////////////////////

constexpr int INF = 1001001001;

struct NodeMin {
  int mn;
  NodeMin() : mn(+INF) {}
  NodeMin(int val) : mn(val) {}
  void pull(const NodeMin &l, const NodeMin &r) {
    mn = min(l.mn, r.mn);
  }
  void ch(int val) {
    mn = val;
  }
  void chmin(int val) {
    if (mn > val) mn = val;
  }
  bool test(int tar) const {
    return (mn <= tar);
  }
};


namespace seg {
using Value = int;
constexpr int MAX_NUM_NODES = 20'000'010;
int n, id, ls[MAX_NUM_NODES], rs[MAX_NUM_NODES];
Value vals[MAX_NUM_NODES];
void init(int n_) {
  n = n_;
  id = 0;
}
int newNode() {
  assert(id < MAX_NUM_NODES);
  const int u = id++;
  ls[u] = rs[u] = -1;
  vals[u] = Value();
  return u;
}
int build(int l, int r) {
  const int u = newNode();
  if (l + 1 == r) return u;
  const int mid = (l + r) / 2;
  ls[u] = build(l, mid);
  rs[u] = build(mid, r);
  return u;
}
int modify(int u, int l, int r, int pos, Value val) {
  if (!(l <= pos && pos < r)) return u;
  const int v = newNode();
  if (l + 1 == r) {
    vals[v] = val;
    return v;
  }
  const int mid = (l + r) / 2;
  ls[v] = modify(ls[u], l, mid, pos, val);
  rs[v] = modify(rs[u], mid, r, pos, val);
  vals[v] = vals[ls[v]] + vals[rs[v]];
  return v;
}
int modify(int u, int pos, Value val) {
  return modify(u, 0, n, pos, val);
}
Value get(int u, int l, int r, int a, int b) {
  if (b <= l || r <= a) return 0;
  if (a <= l && r <= b) return vals[u];
  const int mid = (l + r) / 2;
  return get(ls[u], l, mid, a, b) + get(rs[u], mid, r, a, b);
}
Value get(int u, int a, int b) {
  return get(u, 0, n, a, b);
}

int leftmost(int u, int a) {
  int lo = a, hi = n;
  for (; lo + 1 < hi; ) {
    const int mid = (lo + hi) / 2;
    (get(u, a, mid) ? hi : lo) = mid;
  }
  return lo;
}
int rightmost(int u, int b) {
  int lo = 0, hi = b;
  for (; lo + 1 < hi; ) {
    const int mid = (lo + hi) / 2;
    (get(u, mid, b) ? lo : hi) = mid;
  }
  return lo;
}
}  // seg


int N;
vector<int> H;
SegmentTreePoint<NodeMin> segMin;
vector<pair<int, int>> segs;

void init(int N_, std::vector<int> H_) {
  N = N_;
  H = H_;
  segMin = SegmentTreePoint<NodeMin>(H);
  vector<int> is;
  for (int i = 0, j, k; i < N - 1; i = k) {
    for (j = i; j < N - 1 && H[j] < H[j + 1]; ++j) {}
    for (k = j; k < N - 1 && H[k] > H[k + 1]; ++k) {}
    if (i < j && j < k) {
      if (is.size()) {
        assert(is.back() == i);
        is.pop_back();
      }
      is.push_back(i);
      is.push_back(j);
      is.push_back(k);
    }
  }
  // # mountain
  int len = (int)is.size() / 2;
  assert((int)is.size() == 2 * len + 1);
  Set on(N);
  using Entry = pair<int, pair<int, int>>;
  priority_queue<Entry, vector<Entry>, greater<Entry>> que;
  // count mountains
  seg::init(N);
  int now = seg::build(0, N);
  for (int h = 0; h <= 2 * len; ++h) on.insert(is[h]);
  for (int h = 0; h < 2 * len; ++h) que.emplace(abs(H[is[h]] - H[is[h + 1]]), make_pair(is[h], is[h + 1]));
  for (int h = 1; h <= 2 * len; h += 2) now = seg::modify(now, is[h], 1);
  for (; que.size(); ) {
    const int d = que.top().first;
    const int i = que.top().second.first;
    const int j = que.top().second.second;
    que.pop();
    if (on.contains(i) && on.contains(j)) {
// cerr<<"d = "<<d<<", i = "<<i<<", j = "<<j<<"; on = ";for(int k=0;k<N;++k)if(on.contains(k))cerr<<make_pair(H[k],k)<<" ";cerr<<"now = ";for(int k=0;k<N;++k)cerr<<seg::get(now,k,k+1)<<" ";cerr<<endl;
      segs.emplace_back(d, now);
      on.erase(i);
      on.erase(j);
      now = seg::modify(now, (H[i] > H[j]) ? i : j, 0);
      const int l = on.prev(i);
      const int r = on.next(j);
      if (0 <= l && r < N) {
        que.emplace(abs(H[l] - H[r]), make_pair(l, r));
      }
    }
  }
  segs.emplace_back(INF, now);
}

int max_towers(int L, int R, int D) {
  ++R;
  const int u = lower_bound(segs.begin(), segs.end(), make_pair(D, -INF))->second;
  const int sum = seg::get(u, L, R);
// cerr<<"[max_towers] L = "<<L<<", R = "<<R<<", D = "<<D<<": sum = "<<sum<<endl;
  int ans = sum - 1;
  if (sum) {
    const int l = seg::leftmost(u, L);
    const int r = seg::rightmost(u, R);
// cerr<<"  l = "<<l<<", r = "<<r<<endl;
    if (H[l] - segMin.get(L, l).mn >= D) ++ans;
    if (H[r] - segMin.get(r + 1, R).mn >= D) ++ans;
  }
  chmax(ans, 1);
  return ans;
}