Submission #600534

#	Time	Username	Problem	Language	Result	Execution time	Memory
600534		penguinhacker	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	100 / 100	1256 ms	93680 KiB

sortbooks

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

#define ll long long
#define ar array

const int mxN=1e6;
int n, m, w[mxN], st[1<<21];
vector<ar<int, 3>> queries[mxN];
bool ans[mxN];

void upd(int i, int x, int u=1, int l=0, int r=n-1) {
	if (l==r) {
		st[u]=x;
		return;
	}
	int mid=(l+r)/2;
	i<=mid?upd(i, x, 2*u, l, mid):upd(i, x, 2*u+1, mid+1, r);
	st[u]=max(st[2*u], st[2*u+1]);
}

int qry(int ql, int qr, int u=1, int l=0, int r=n-1) {
	if (l>qr||r<ql)
		return 0;
	if (ql<=l&&r<=qr)
		return st[u];
	int mid=(l+r)/2;
	return max(qry(ql, qr, 2*u, l, mid), qry(ql, qr, 2*u+1, mid+1, r));
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> m;
	for (int i=0; i<n; ++i)
		cin >> w[i];
	for (int i=0; i<m; ++i) {
		int l, r, k;
		cin >> l >> r >> k, --l, --r;
		queries[r].push_back({l, k, i});
	}
	vector<int> st;
	for (int i=0; i<n; ++i) {
		while(st.size()&&w[i]>=w[st.back()])
			st.pop_back();
		if (st.size())
			upd(st.back(), w[i]+w[st.back()]);
		for (auto [l, k, ind] : queries[i])
			ans[ind]=qry(l, i)<=k;
		st.push_back(i);
	}
	for (int i=0; i<m; ++i)
		cout << ans[i] << "\n";
	return 0;
}

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