Submission #973349

#	Time	Username	Problem	Language	Result	Execution time	Memory
973349		colossal_pepe	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	0 / 100	1429 ms	121264 KiB

sortbooks

#include <bits/stdc++.h>
using namespace std;

const int INF = 1e9;

struct SGT {
	int n;
	vector<int> mx, mn;
	vector<bool> lazy;
	SGT(int _n) {
		n = _n;
		mx.resize(4 * n), mn.resize(4 * n, INF), lazy.resize(4 * n, 0);
	}
	void build(int node, int l, int r, vector<int> &a) {
		if (l == r) mx[node] = a[l];
		else {
			int mid = (l + r) / 2;
			build(2 * node, l, mid, a);
			build(2 * node + 1, mid + 1, r, a);
			mx[node] = max(mx[2 * node], mx[2 * node + 1]);
		}
	}
	void push(int node) {
		if (not lazy[node]) return;
		mn[2 * node] = mn[2 * node + 1] = mn[node];
		lazy[node] = 0;
	}
	void update(int node, int l, int r, int L, int R, int x) {
		if (R < l or r < L) return;
		else if (L <= l and r <= R) {
			mn[node] = x;
			lazy[node] = 1;
		} else {
			push(node);
			int mid = (l + r) / 2;
			update(2 * node, l, mid, L, R, x);
			update(2 * node + 1, mid + 1, r, L, R, x);
			mn[node] = min(mn[2 * node], mn[2 * node + 1]);
		}
	}
	int query(int node, int l, int r, int L, int R) {
		if (R < l or r < L) return 0;
		else if (L <= l and r <= R) return mx[node] - mn[node];
		else {
			push(node);
			int mid = (l + r) / 2;
			return max(query(2 * node, l, mid, L, R), query(2 * node + 1, mid + 1, r, L, R));
		}
	}
};

int n, m;
vector<int> a, ans;
vector<pair<int, int>> q;
vector<vector<int>> r2q;
vector<int> mx, mn, lazy;

void solve() {
	SGT sgt = SGT(n);
	sgt.build(1, 0, n - 1, a);
	stack<int> st;
	ans.resize(m);
	for (int r = 0; r < n; r++) {
		while (not st.empty() and a[st.top()] > a[r]) st.pop();
		sgt.update(1, 0, n - 1, (st.empty() ? 0 : st.top() + 1), r, a[r]);
		st.push(r);
		for (int qi : r2q[r]) {
			auto [l, k] = q[qi];
			ans[qi] = (k >= sgt.query(1, 0, n - 1, l, r));
		}
	}
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> n >> m;
	a.resize(n);
	for (int &x : a) {
		cin >> x;
	}
	q.resize(m), r2q.resize(n);
	for (int i = 0; i < m; i++) {
		int l, r, k;
		cin >> l >> r >> k;
		l--, r--;
		q[i] = make_pair(l, k);
		r2q[r].push_back(i);
	}
	solve();
	for (int i = 0; i < m; i++) {
		cout << ans[i] << '\n';
	}
	return 0;
}

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