Submission #1285212

#	Time	Username	Problem	Language	Result	Execution time	Memory
1285212		LIA	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	Compilation error	0 ms	0 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vll vector<ll>
#define loop(i, s, e) for (ll i = s; i < e; ++i)
#define pll pair<ll, ll>
struct Seg {
  vll seg;
  ll sz = 1;
  Seg(ll n) {
    for (; sz < n; sz <<= 1)
      ;
    seg.resize(2 * sz);
  }

  void update(ll i, ll v) {
    i += sz;
    seg[i] = v;
    for (i /= 2; i > 0; i /= 2)
      seg[i] = max(seg[i * 2], seg[i * 2 + 1]);
  }

  ll query(ll l, ll r) {
    ll ans = 0;
    l += sz, r += sz;
    while (l <= r) {
      if (l & 1)
        ans = max(ans, seg[l++]);
      if (!(r & 1))
        ans = max(ans, seg[r--]);
      l /= 2;
      r /= 2;
    }
    return ans;
  }
};

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(NULL);
  ll n, m;
  cin >> n >> m;
  vector<ll> prevGreater(n, -1);
  vector<ll> st;
  st.reserve(n);
  for (ll i = 0; i < n; ++i) {
    while (!st.empty() && w[st.back()] <= w[i])
      st.pop_back();
    prevGreater[i] = st.empty() ? -1 : st.back();
    st.push_back(i);
  }
  Seg seg(n);
  for (ll i = 0; i < n; ++i)
    seg.update(i, prevGreater[i]);

  while (m--) {
    ll l, r, k;
    cin >> l >> r >> k;
    bool ans = 1;
    l--, r--;
    ll maxi = seg.query(l, r);
    if (maxi >= l) {
      ans = 0;
    }
    cout << ans << "\n";
  }
  return 0;
}

Compilation message (stderr)

sortbooks.cpp: In function 'int main()':
sortbooks.cpp:47:27: error: 'w' was not declared in this scope
   47 |     while (!st.empty() && w[st.back()] <= w[i])
      |                           ^