Submission #342798

#	Time	Username	Problem	Language	Result	Execution time	Memory
342798		Tosic	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	21 / 100	1775 ms	53432 KiB

sortbooks

#include <bits/stdc++.h>
#define maxn 4000010
using namespace std;

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

struct node
{
	int maxS, minS, res;
	node(){
		maxS = 0;
		minS = 1e9+10;
		res = 0;
	}
};

node segTree[maxn];

void init(int idx, int l, int r){
	if(l == r){
		segTree[idx].maxS = segTree[idx].minS = a[l];
		return;
	}
	int mid = (r+l)/2;
	init(idx*2+1, l, mid);
	init(idx*2+2, mid+1, r);
	segTree[idx].maxS = max(segTree[idx*2+1].maxS, segTree[idx*2+2].maxS);
	segTree[idx].minS = min(segTree[idx*2+1].minS, segTree[idx*2+2].minS);
	segTree[idx].res = max(segTree[idx*2+1].res, segTree[idx*2+2].res);
	if(segTree[idx*2+1].maxS > segTree[idx*2+2].minS){
		segTree[idx].res = max(segTree[idx*2+1].maxS+segTree[idx*2+2].minS, segTree[idx].res);
	}

}

node query(int idx, int l, int r, int ql, int qr){
	if(l >= ql and r <= qr){
		return segTree[idx];
	}
	if(l > qr or r<ql){
		node tmp;
		return tmp;
	}
	int mid = (l+r)/2;
	node a = query(idx*2+1, l, mid, ql, qr);
	node b = query(idx*2+2, mid+1 ,r, ql, qr);
	node c;
	c.maxS = max(a.maxS, b.maxS);
	c.minS = min(a.minS, b.minS);
	c.res = max(a.res, b.res);
	if(a.maxS > b.minS){ c.res = max(c.res, a.maxS+b.minS);}
	return c;
}

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;
		}
		if(n <= 500){
			int tmp = 0,res = 0;
			for(int i=l; i <= r; ++i){
				if(tmp > a[i]){
					res = max(res, tmp+a[i]);
				}
				
				tmp = max(tmp, a[i]);
			}
			cout << (res<=k) << '\n';
			continue;
		}
		//cerr << query(0,0,n-1,l,r).res << '\n';
		cout << (query(0, 0, n-1, l, r).res <= k) << '\n';
	}
}

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