Submission #170251

#	Time	Username	Problem	Language	Result	Execution time	Memory
170251		Lightning	Hedgehog Daniyar and Algorithms (IZhO19_sortbooks)	C++14	100 / 100	1430 ms	87288 KiB

sortbooks

#include <iostream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <set>
#include <map>
#include <iomanip>
#include <stack>
#include <queue>
#include <deque>

using namespace std;

typedef long long ll;
typedef pair <int, int> pii;

#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define pb push_back
#define ppb pop_back
#define mkp make_pair
#define F first
#define S second
#define show(a) cerr << #a <<" -> "<< a <<"\n"
#define fo(a, b, c, d) for(int (a) = (b); (a) <= (c); (a) += (d))
#define foo(a, b, c ,d) for(int (a) = (b); (a) >= (c); (a) -= (d))
//#define int ll

const int szT = (1 << 20) - 1;
const int INF = 1e9 + 5;

int n, m, a[szT], t[szT * 3];
vector <pair <int, pii> > que[szT];
stack <int> st;
bool ans[szT];

void upd(int pos, int x) {
	pos += szT;
	t[pos] = max(t[pos], x);
	while((pos /= 2) >= 1) {
		t[pos] = max(t[pos << 1], t[(pos << 1) ^ 1]);
	}
}

int get(int l, int r) {
	int res = 0;
	for(l += szT, r += szT; l <= r; l >>= 1, r >>= 1) {
		if(l & 1) res = max(res, t[l++]);
		if(!(r & 1)) res = max(res, t[r--]);
		if(l > r) break;
	}
	return res;
}

int main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> n >> m;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i];	
	}
	for(int i = 1; i <= m; ++i) {
		int l, r, k;
		cin >> l >> r >> k;
		que[r].pb(mkp(l, mkp(k, i)));
	}
	for(int i = 1; i <= n; ++i) {
		while(sz(st) && a[i] >= a[st.top()]) {
			st.pop();
		}
		if(sz(st)) {
			upd(st.top(), a[i] + a[st.top()]);
		} 
//		upd(i, a[i]);
		for(auto it : que[i]) {
			int l = it.F;
			int r = i;
			int k = it.S.F;
			int id = it.S.S;
			if(get(l, r) <= k) {
				ans[id] = 1;
			} else {
				ans[id] = 0;
			}
		}
		st.push(i);
	}
	for(int i = 1; i <= m; ++i) {
		cout << ans[i] <<'\n';
	}
	return 0;
}
/*
	If you only do what you can do, 
	You will never be more than you are now!
	-----------------------------------------	
	We must all suffer from one of two pains: 
	 the pain of discipline 
	 or the pain of regret. 
	The difference is discipline weighs grams 
	 while regret weighs tons.
*/

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