Submission #467041

#	Time	Username	Problem	Language	Result	Execution time	Memory
467041		hhhhaura	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1346 ms	73608 KiB

sortbooks

#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i ++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define all(x) x.begin(), x.end()
#define ceil(a, b) ((a + b - 1) / (b))

using namespace std;

#define pii pair<int, int>
namespace bit {
	int n;
	vector<int> v;
	void init_(int _n) {
		n = _n;
		v.assign(n + 1, 0);
	}
	int lowbit(int x) {
		return x & (-x);
	}
	void modify(int x, int val) {
		for(int i = x; i <= n; i += lowbit(i)) {
			v[i] = max(v[i], val);
		}
	}
	int query(int x) {
		int ans = 0;
		for(int i = x; i > 0; i -= lowbit(i)) {
			ans = max(ans, v[i]);
		}
		return ans;
	}
};
namespace solver {
	int n, m;
	vector<int> a, ans, r, k;
	vector<vector<int>> q;
	vector<pii> p;
	void init_(int _n, int _m) {
		n = _n, m = _m;
		a.assign(n + 1, 0);
		ans.assign(m + 1, 0);
		r.assign(m + 1, 0);
		k.assign(m + 1, 0);
		q.assign(n + 1, vector<int>());
		p.clear();
		bit::init_(n);
	}
	void solve() {
		vector<int> s;
		rep(i, 1, n) {
			while(s.size() && a[s.back()] <= a[i]) s.pop_back();
			if(s.size()) p.push_back({s.back(), i});
			s.push_back(i);
		}
		sort(all(p));
		int ii = signed(p.size()) - 1;
		rrep(i, 1, n) {
			while(ii >= 0 && p[ii].first >= i) {
				int L = p[ii].first, R = p[ii].second;
				bit::modify(R, a[L] + a[R]);
				ii--;
			}
			for(auto j : q[i]) {
				ans[j] = bit::query(r[j]) <= k[j];
			}
		}
		rep(i, 1 ,m) cout << ans[i] << "\n"; 
	}
};
using namespace solver;
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n, m;
	cin >> n >> m;
	init_(n, m);
	rep(i, 1, n) cin >> a[i];
	rep(i, 1, m) {
		int l; cin >> l;
		cin >> r[i] >> k[i];
		q[l].push_back(i);
	}
	solve();
	return 0;
}  

Compilation message (stderr)

sortbooks.cpp:4: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    4 | #pragma loop-opt(on)
      |

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