Submission #943598

#	Time	Username	Problem	Language	Result	Execution time	Memory
943598		PlayVoltz	Triple Jump (JOI19_jumps)	C++17	100 / 100	1238 ms	158132 KiB

jumps

#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
using namespace std;

#define int long long
#define pb push_back
#define mp make_pair
#define pii pair<int, int>
#define fi first
#define se second

vector<int> vect;

struct node{
	int s, e, m, val, lazy, c, sum;
	node *l, *r;
	void propagate(){
		if (lazy==-1)return;
		val=max(val, lazy);
		sum=max(sum, val+c);
		if (s!=e){
			l->lazy=max(l->lazy, lazy);
			r->lazy=max(r->lazy, lazy);
		}
		lazy=-1;
	}
	node(int S, int E){
		s = S, e = E, m = (s+e)/2;
		val=sum=-1e9;
		lazy=-1;
		if (s!=e){
			l = new node(s, m);
			r = new node(m+1, e);
			c=max(l->c, r->c);
		}
		else c=vect[s];
	}
	void up(int left, int right, int v){
		if (left>right)return;
		propagate();
		if (s==left && e==right)lazy=max(lazy, v);
		else{
			if (right<=m)l->up(left, right, v);
			else if (left>m)r->up(left, right, v);
			else l->up(left, m, v), r->up(m+1, right, v);
			r->propagate(), l->propagate();
			sum=max(l->sum, r->sum);
		}
		
	}
	int query(int left, int right){
		propagate();
		if (s==left && e==right)return sum;
		if (right<=m)return l->query(left, right);
		else if (left>m)return r->query(left, right);
		else return max(l->query(left, m), r->query(m+1, right));
	}
}*st;

int32_t main(){
	int n, q, a, b;
	cin>>n;
	vect.resize(n+1);
	vector<vector<pii> > queries(n+1);
	for (int i=1; i<=n; ++i)cin>>vect[i];
	cin>>q;
	vector<int> ans(q);
	vector<vector<int> > next(n+1);
	st = new node(1, n);
	for (int i=0; i<q; ++i){
		cin>>a>>b;
		queries[a].pb(mp(b, i));
	}
	stack<int> s;
	for (int i=1; i<=n; ++i){
		while (!s.empty()&&vect[s.top()]<=vect[i])next[s.top()].pb(i), s.pop();
		s.push(i);
	}
	while (!s.empty())s.pop();
	for (int i=n; i>=1; --i){
		while (!s.empty()&&vect[s.top()]<=vect[i])next[i].pb(s.top()), s.pop();
		s.push(i);
	}
	for (int i=n; i>=1; --i){
		for (auto c:next[i])st->up(2*c-i, n, vect[i]+vect[c]);
		for (auto c:queries[i])ans[c.se]=st->query(i, c.fi);
	}
	for (auto a:ans)cout<<a<<"\n";
}

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