Submission #342955

#	Time	Username	Problem	Language	Result	Execution time	Memory
342955		Tosic	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++17	0 / 100	254 ms	44920 KiB

sortbooks

#include <bits/stdc++.h>
#define maxn 800010
using namespace std;

int n, m, a[maxn], allR[maxn], ans;

vector<int> sorted[maxn];

void init(int idx, int l, int r){
	if(l == r){
		sorted[idx]={a[l]};
		return;
	}
	int mid = (r+l)/2;
	init(idx*2+1, l, mid);
	init(idx*2+2, mid+1, r);
	sorted[idx].resize(sorted[idx*2+1].size()+sorted[idx*2+2].size());
	int tmp = lower_bound(sorted[idx*2+2].begin(), sorted[idx*2+2].end(), sorted[idx*2+1].back()) - sorted[idx*2+2].begin();
	--tmp;
	allR[idx] = max(allR[idx*2+1], allR[idx*2+2]);
	if(tmp >= 0){
		allR[idx] = max(allR[idx], sorted[idx*2+2][tmp] + sorted[idx*2+1].back() );
	}
	merge(sorted[idx*2+1].begin(), sorted[idx*2+1].end(), sorted[idx*2+2].begin(), sorted[idx*2+2].end(), sorted[idx].begin());

}

vector<int> allIx;

int query(int idx, int l, int r, int ql, int qr){
	if(l >= ql and r <= qr){
		allIx.push_back(idx);
		return allR[idx];
	}
	if(l > qr or r<ql){
		return 0;
	}
	int mid = (l+r)/2;
	return max(query(idx*2+1, l, mid, ql, qr),query(idx*2+2, mid+1, r, ql, qr));
}

int main(){
	ios_base::sync_with_stdio(0);
	cout.tie(0);
	cin.tie(0);
	cin >> n >> m;
	for(int i = 0; i < n; ++i){
		cin >> a[i];
	}
	init(0, 0, n-1);
	for(int i = 0; i < m; ++i){
		int l,r,k;
		cin>>l>>r>>k;
		--l, --r;
		if(l == r){
			cout << "1\n";
			continue;
		}
		allIx.clear();
		int tmp = query(0,0, n-1,l,r), pr = -1;
		for(auto j:allIx){
			int tmpIdx=lower_bound(sorted[j].begin(), sorted[j].end(),pr)-sorted[j].begin();
			--tmpIdx;
			if(tmpIdx >= 0){
				tmp = max(sorted[j][tmpIdx] + pr, tmp);
			}
			pr = max(pr, sorted[j].back());
		}
		cout << (tmp<=k) << '\n';
	}
}

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