Submission #538967

#	Time	Username	Problem	Language	Result	Execution time	Memory
538967		akhan42	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	0 / 100	1296 ms	262144 KiB

sortbooks

//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

#define F first
#define S second
#define forn(i, n) for(int i = 0; i < n; ++i)
#define forbn(i, b, n) for(int i = b; i < n; ++i)
#define sz(v) (int)v.size()
#define pb push_back
#define mp make_pair
#define eb emplace_back
#define all(v) v.begin(), v.end()
#define min3(a, b, c) min(a, min(b, c))
#define max3(a, b, c) max(a, max(b, c))

typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef long long ll;
typedef complex<double> cd; // !!! long double slow

template <class T> inline void mineq(T &a, T b) { a = min(a, b); }
template <class T> inline void maxeq(T &a, T b) { a = max(a, b); }


int n, q;
const int INF = 1000 * 1000 * 1000 + 10;


struct Seg {
	vi mx, t;
	vector<vi> sl;

	Seg(vi& a) {
		mx.assign(4 * n, -INF);
		t.assign(4 * n, -INF);
		sl.resize(4 * n);

		build(a);
	}

	void build(vi& a, int v = 1, int tl = 0, int tr = n - 1) {
		if(tl == tr) {
			mx[v] = a[tl];
			sl[v].pb(a[tl]);
			return;
		}
		int tm = (tl + tr) / 2;

		build(a, 2 * v, tl, tm);
		build(a, 2 * v + 1, tm + 1, tr);

		mx[v] = max(mx[2 * v], mx[2 * v + 1]);
		merge(all(sl[2 * v]), all(sl[2 * v + 1]), back_inserter(sl[v]));

		t[v] = max(t[2 * v], t[2 * v + 1]);
		int ind = lower_bound(all(sl[2 * v + 1]), mx[2 * v]) - sl[2 * v + 1].begin();
		if(ind != 0)
			maxeq(t[v], mx[2 * v] + sl[2 * v + 1][ind - 1]);
	}

	pair<bool, int> query(int l, int r, int k, int lp, int rp, int v = 1, int tl = 0, int tr = n - 1) {
		if(l > r)
			return {true, -INF};
		if(tl == l && r == tr) {
			int indl = lower_bound(all(sl[v]), lp) - sl[v].begin();
			int indr = lower_bound(all(sl[v]), rp + 1) - sl[v].begin();
			bool ans = t[v] <= k && indl == indr;

			return {ans, mx[v]};
		}
		int tm = (tl + tr) / 2;

		auto q1 = query(l, min(r, tm), k, lp, rp, 2 * v, tl, tm);
		if(q1.S > rp) {
			rp = q1.S - 1;
			lp = k - q1.S + 1;
		}
		auto q2 = query(max(l, tm + 1), r, k, lp, rp, 2 * v + 1, tm + 1, tr);

		return {q1.F && q2.F, max(q1.S, q2.S)};
	}
};



void solve() {
	cin >> n >> q;
	vi a(n);
	forn(i, n)
		cin >> a[i];

	Seg seg(a);

	forn(_, q) {
		int l, r, k;
		cin >> l >> r >> k;
		l--; r--;

		auto ans = seg.query(l, r, k, (k + 1) / 2, (k - 1) / 2);
		cout << ans.F << '\n';
	}

//	forn(k, 15) {
//		auto ans = seg.query(0, n - 1, k, (k + 1) / 2, (k - 1) / 2);
//		cout << k << ' ' << ans.F << '\n';
//	}
}


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

//	freopen("boards.in", "r", stdin);
//	freopen("boards.out", "w", stdout);

    int t = 1;
//  cin >> t;
    while(t--) {
        solve();
    }
}

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