Submission #546827

#	Time	Username	Problem	Language	Result	Execution time	Memory
546827		Arnch	Triple Jump (JOI19_jumps)	C++17	100 / 100	1124 ms	148556 KiB

jumps

// oooo
/*
 har chi delet mikhad bebar ~
 gitar o ba khodet nabar! ~
 ;Amoo_Hasan;
*/

#include<bits/stdc++.h>
//#pragma GCC optimize("O3,no-stack-protector,unroll-loops")
//#pragma GCC target("avx2,fma")

using namespace std;

typedef long long ll;
typedef long double ld;

#define Sz(x) int((x).size())
#define All(x) (x).begin(), (x).end()
#define wtf(x) cout<<#x <<" : " <<x <<endl
#define endl '\n'

constexpr ll inf = 1e18, N = 1e6 + 10, mod = 1e9 + 7, pr = 1000696969;

int a[N], lm[N], rm[N], ansl[N], ansr[N], ans[N];
pair<int, int> p[N];
vector<int> query[N], st[N];

struct node {
	int ans, lz, mx = 0;
	node() {
		ans = lz = mx = 0;
	}
} x[N << 2];
void build(int l, int r, int v) {
	if(r - l < 2) {
		x[v].mx = a[l];
		return;
	}
	int mid = (l + r) >> 1;
	build(l, mid, 2 * v);
	build(mid, r, 2 * v + 1);
	x[v].mx = max(x[2 * v].mx, x[2 * v + 1].mx);
}
void put(int l, int r, int v) {
	x[2 * v].ans = max(x[2 * v].ans, x[v].lz + x[2 * v].mx);
	x[2 * v].lz = max(x[2 * v].lz, x[v].lz);
	x[2 * v + 1].ans = max(x[2 * v + 1].ans, x[v].lz + x[2 * v + 1].mx);
	x[2 * v + 1].lz = max(x[2 * v + 1].lz, x[v].lz);
}
void change(int l, int r, int s, int e, int val, int v) {
	if(r <= s || l >= e) return;
	if(l >= s && r <= e) {
		x[v].lz = max(x[v].lz, val);
		x[v].ans = max(x[v].ans, val + x[v].mx);
		return;
	}
	int mid = (l + r) / 2;
	put(l, r, v);
	change(l, mid, s, e, val, 2 * v);
	change(mid, r, s, e, val, 2 * v + 1);
	x[v].ans = max(x[v].lz + x[v].mx, max(x[2 * v].ans, x[2 * v + 1].ans));
}
int get(int l, int r, int s, int e, int v) {
	if(r <= s || l >= e) return 0;
	if(l >= s && r <= e) return x[v].ans;
	put(l, r, v);
	int mid = (l + r) >> 1;
	return max(get(l, mid, s, e, 2 * v), get(mid, r, s, e, 2 * v + 1));
}

int main() {
    ios :: sync_with_stdio(0), cin.tie(0);

	int n; cin >>n;
	for(int i = 0; i < n; i++) {
		cin >>a[i];
	}
	int q; cin >>q;
	for(int i = 0; i < q; i++) {
		cin >>p[i].first >>p[i].second;
		p[i].first--, p[i].second--;
		query[p[i].first].push_back(i);
	}
		
	vector<int> vc;
	for(int i = 0; i < n; i++) {
		while(!vc.empty() && a[vc.back()] < a[i]) vc.pop_back();
		if(vc.empty()) lm[i] = -1;
		else lm[i] = vc.back();
		vc.push_back(i);
	}
	vc.clear();
	for(int i = n - 1; i >= 0; i--) {
		while(!vc.empty() && a[vc.back()] < a[i]) vc.pop_back();
		if(vc.empty()) rm[i] = n;
		else rm[i] = vc.back();
		vc.push_back(i);
	}

	build(0, n, 1);
	
	for(int i = n - 1; i >= 0; i--) {
		if(rm[i] != n) {
			int ind = rm[i] + (rm[i] - i);
			if(ind < n)
				change(0, n, ind, n, a[i] + a[rm[i]], 1);
		}
		for(auto j : st[i]) {
			change(0, n, j + (j - i), n, a[i] + a[j], 1);
		}
		if(lm[i] != -1) {
			int ind = i + (i - lm[i]);
			if(ind < n) {
				st[lm[i]].push_back(i);
			}
		}
		for(auto j : query[i]) {
			ans[j] = get(0, n, p[j].first, p[j].second + 1, 1);
		}
	}

	for(int i = 0; i < q; i++) cout<<ans[i] <<endl;
	

    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 14 / 14
• Subtask 3: 27 / 27
• Subtask 4: 54 / 54