Submission #899096

#	Time	Username	Problem	Language	Result	Execution time	Memory
899096		d4xn	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	13 / 100	678 ms	223268 KiB

sortbooks

#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math,inline")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,lzcnt,mmx,abm,avx,avx2,fma")
#include <bits/stdc++.h>
using namespace std;
 
#define all(x) x.begin(), x.end()
#define tp3 tuple<int, int, int>
 
const int N = 1e6, L = 20, inf = INT_MAX;
 
int n, m, mnA, mxK, a[N], b[N], mxL[N], lg[N+1], st[L][N], seg[N*4];
vector<int> lf[N];
vector<tp3> q[N];
bitset<N> vis, ans;
 
void build(int p=1, int l=0, int r=n-1) {
  if (l == r) {
    seg[p] = (b[l] == -1 ? 0 : (a[l] + a[b[l]]));
    return;
  }
 
  int mid = (l+r) >> 1;
  build(p << 1, l, mid);
  build((p << 1) + 1, mid+1, r); 
 
  seg[p] = max(seg[p << 1], seg[(p << 1) + 1]);
}
 
void update(int x, int p=1, int l=0, int r=n-1) {
  if (l == r) {
    seg[p] = 0;
    return;
  }
 
  int mid = (l+r) >> 1;
  if (x <= mid) update(x, p << 1, l, mid);
  else update(x, (p << 1) + 1, mid+1, r); 
 
  seg[p] = max(seg[p << 1], seg[(p << 1) + 1]);
}
 
int query(int x, int y, int p=1, int l=0, int r=n-1) {
  if (x <= l && r <= y) {
    return seg[p];
  }
 
  int mid = (l+r) >> 1;
  if (y <= mid) {
    return query(x, y, p << 1, l, mid);
  }
  else if(mid+1 <= x) {
    return query(x, y, (p << 1) + 1, mid+1, r);
  }
  else {
    return max(query(x, y, p << 1, l, mid), query(x, y, (p << 1) + 1, mid+1, r));
  }
}
 
int querySt(int l, int r) {
  int x = lg[r-l+1];
  return max(st[x][l], st[x][r - (1 << x) + 1]);
}
 
signed main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);
 
  lg[1] = 0;
  for (int i = 2; i <= N; i++) {
    lg[i] = lg[i >> 1] + 1;
  }
 
  cin >> n >> m;
  mnA = inf;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    mnA = min(mnA, a[i]);
    st[0][i] = a[i];
  }
 
  mxK = -inf;
  for (int i = 0; i < m; i++) {
    int l, r, k;
    cin >> l >> r >> k;
    l--; r--;
    mxK = max(mxK, k);
    q[l].push_back(make_tuple(r, k, i));
  }
 
  if (mxK < mnA) {
    int curr = 0;
    mxL[0] = 0;
    for (int i = 1; i < n; i++) {
      if (a[i-1] > a[i]) {
        curr = i;
      }
      mxL[i] = curr;
    }
 
    for (int l = 0; l < n; l++) {
      for (auto& [r, k, idx] : q[l]) {
        ans[idx] = (mxL[r] <= l);
      }
    }
  }
  else {
    for (int j = 1; j < L; j++) {
      for (int i = 0; i < n; i++) {
        st[j][i] = max(st[j-1][i], st[j-1][i + (1 << (j-1))]);
      }
    }
 
    for (int i = 0; i < n; i++) {
      int l = -1;
      int r = i-1;
      while (l < r) {
        int mid = (l+r+1)/2;
 
        int x = querySt(mid, i-1);
        if (x > a[i]) l = mid;
        else r = mid-1;
      }
      if (vis[l]) continue;
      vis[l] = 1;
      
      b[i] = l;
      lf[l].push_back(i);
    }
 
    build();
    for (int l = 0; l < n; l++) {
      for (auto& [r, k, idx] : q[l]) {
        ans[idx] = (query(l, r) <= k);
      }
 
      for (int& i : lf[l]) {
        update(i);
      }
    }
  }
 
  for (int i = 0; i < m; i++) {
      cout << ans[i] << "\n";
    }
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 13 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 30
• Subtask 6: 0 / 23