답안 #418764

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
418764	2021-06-05T20:38:56 Z	MohamedAhmed04	3단 점프 (JOI19_jumps)	C++17	100 / 100	1430 ms	87872 KB

jumps

#include <bits/stdc++.h>

using namespace std ;

const int MAX = 5e5 + 10 ;

int arr[MAX] ;
int n ;

vector< pair<int , int> >queries[MAX] ;
vector<int>v[MAX] ;

int ans[MAX] ;

struct Node
{
	int x = 0 , y = 0 , val = 0 ;
};

Node tree[4 * MAX] ;

Node Merge(Node &a , Node &b)
{
	Node c ;
	c.x = max(a.x , b.x) ;
	c.y = max(a.y , b.y) ;
	c.val = max({a.val , b.val , a.y + b.x}) ;
	return c ;
}

void build(int node , int l , int r)
{
	if(l == r)
	{
		tree[node].x = arr[l] ;
		tree[node].val = tree[node].x + tree[node].y ;
		return ;
	}
	int mid = (l + r) >> 1 ;
	build(node << 1 , l , mid) ;
	build(node << 1 | 1 , mid+1 , r) ;
	tree[node] = Merge(tree[node << 1] , tree[node << 1 | 1]) ;
}

void update(int node , int l , int r , int idx , int val)
{
	if(idx > r || idx < l)
		return ;
	if(l == r)
	{
		tree[node].y = max(tree[node].y , val) ;
		tree[node].val = tree[node].x + tree[node].y ;
		return ;
	}
	int mid = (l + r) >> 1 ;
	update(node << 1 , l , mid , idx , val) ;
	update(node << 1 | 1 , mid+1 , r , idx , val) ;
	tree[node] = Merge(tree[node << 1] , tree[node << 1 | 1]) ;
}

Node tmp ;

Node query(int node , int l , int r , int from , int to)
{
	if(from > r || to < l)
		return tmp ;
	if(l >= from && r <= to)
		return tree[node] ;
	int mid = (l + r) >> 1 ;
	Node x = query(node << 1 , l , mid , from , to) ;
	Node y = query(node << 1 | 1 , mid+1 , r , from , to) ;
	return Merge(x , y) ;
}

int main()
{
	ios_base::sync_with_stdio(0) ;
	cin.tie(0) ;
	cin>>n ;
	for(int i = 1 ; i <= n ; ++i)
		cin>>arr[i] ;
	int q ;
	cin>>q ;
	for(int i = 1 ; i <= q ; ++i)
	{
		int l , r ;
		cin>>l>>r ;
		queries[l].emplace_back(r , i) ;
	}
	stack<int>s ;
	for(int i = 1 ; i <= n ; ++i)
	{
		while(s.size() && arr[i] >= arr[s.top()])
			v[s.top()].push_back(i) , s.pop() ;
		if(s.size())
			v[s.top()].push_back(i) ;
		s.push(i) ;
	}
	build(1 , 1 , n) ;
	for(int i = n ; i >= 1 ; --i)
	{
		for(auto &j : v[i])
		{
			if(2*j - i <= n)
				update(1 , 1 , n , 2*j - i , arr[i] + arr[j]) ;
		}
		for(auto &p : queries[i])
			ans[p.second] = query(1 , 1 , n , i+2 , p.first).val ;
	}
	for(int i = 1 ; i <= q ; ++i)
		cout<<ans[i]<<"\n" ;
	return 0 ;
}

Subtask #1
5.0 / 5.0

#	결과	실행 시간	메모리	Grader output
1	Correct	17 ms	23756 KB	Output is correct
2	Correct	16 ms	23720 KB	Output is correct
3	Correct	14 ms	23816 KB	Output is correct
4	Correct	15 ms	23756 KB	Output is correct
5	Correct	16 ms	23756 KB	Output is correct
6	Correct	15 ms	23764 KB	Output is correct
7	Correct	16 ms	23756 KB	Output is correct
8	Correct	16 ms	23756 KB	Output is correct
9	Correct	16 ms	23804 KB	Output is correct
10	Correct	15 ms	23780 KB	Output is correct

Subtask #2
14.0 / 14.0

#	결과	실행 시간	메모리	Grader output
1	Correct	17 ms	23756 KB	Output is correct
2	Correct	16 ms	23720 KB	Output is correct
3	Correct	14 ms	23816 KB	Output is correct
4	Correct	15 ms	23756 KB	Output is correct
5	Correct	16 ms	23756 KB	Output is correct
6	Correct	15 ms	23764 KB	Output is correct
7	Correct	16 ms	23756 KB	Output is correct
8	Correct	16 ms	23756 KB	Output is correct
9	Correct	16 ms	23804 KB	Output is correct
10	Correct	15 ms	23780 KB	Output is correct
11	Correct	479 ms	42620 KB	Output is correct
12	Correct	536 ms	42508 KB	Output is correct
13	Correct	476 ms	42504 KB	Output is correct
14	Correct	474 ms	42660 KB	Output is correct
15	Correct	493 ms	42700 KB	Output is correct
16	Correct	476 ms	41980 KB	Output is correct
17	Correct	465 ms	42052 KB	Output is correct
18	Correct	453 ms	41816 KB	Output is correct
19	Correct	449 ms	42436 KB	Output is correct

Subtask #3
27.0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Correct	214 ms	38852 KB	Output is correct
2	Correct	137 ms	38684 KB	Output is correct
3	Correct	133 ms	39520 KB	Output is correct
4	Correct	219 ms	38928 KB	Output is correct
5	Correct	218 ms	38852 KB	Output is correct
6	Correct	209 ms	38212 KB	Output is correct
7	Correct	210 ms	38084 KB	Output is correct
8	Correct	206 ms	38160 KB	Output is correct
9	Correct	211 ms	38468 KB	Output is correct

Subtask #4
54.0 / 54.0

#	결과	실행 시간	메모리	Grader output
1	Correct	17 ms	23756 KB	Output is correct
2	Correct	16 ms	23720 KB	Output is correct
3	Correct	14 ms	23816 KB	Output is correct
4	Correct	15 ms	23756 KB	Output is correct
5	Correct	16 ms	23756 KB	Output is correct
6	Correct	15 ms	23764 KB	Output is correct
7	Correct	16 ms	23756 KB	Output is correct
8	Correct	16 ms	23756 KB	Output is correct
9	Correct	16 ms	23804 KB	Output is correct
10	Correct	15 ms	23780 KB	Output is correct
11	Correct	479 ms	42620 KB	Output is correct
12	Correct	536 ms	42508 KB	Output is correct
13	Correct	476 ms	42504 KB	Output is correct
14	Correct	474 ms	42660 KB	Output is correct
15	Correct	493 ms	42700 KB	Output is correct
16	Correct	476 ms	41980 KB	Output is correct
17	Correct	465 ms	42052 KB	Output is correct
18	Correct	453 ms	41816 KB	Output is correct
19	Correct	449 ms	42436 KB	Output is correct
20	Correct	214 ms	38852 KB	Output is correct
21	Correct	137 ms	38684 KB	Output is correct
22	Correct	133 ms	39520 KB	Output is correct
23	Correct	219 ms	38928 KB	Output is correct
24	Correct	218 ms	38852 KB	Output is correct
25	Correct	209 ms	38212 KB	Output is correct
26	Correct	210 ms	38084 KB	Output is correct
27	Correct	206 ms	38160 KB	Output is correct
28	Correct	211 ms	38468 KB	Output is correct
29	Correct	1430 ms	82144 KB	Output is correct
30	Correct	1167 ms	81560 KB	Output is correct
31	Correct	1185 ms	83580 KB	Output is correct
32	Correct	1379 ms	82136 KB	Output is correct
33	Correct	1387 ms	82088 KB	Output is correct
34	Correct	1356 ms	79812 KB	Output is correct
35	Correct	1385 ms	79536 KB	Output is correct
36	Correct	1396 ms	79428 KB	Output is correct
37	Correct	1368 ms	80908 KB	Output is correct
38	Correct	1068 ms	87872 KB	Output is correct
39	Correct	1073 ms	87780 KB	Output is correct
40	Correct	1048 ms	84348 KB	Output is correct
41	Correct	1051 ms	84016 KB	Output is correct
42	Correct	1051 ms	83920 KB	Output is correct
43	Correct	1064 ms	85780 KB	Output is correct
44	Correct	1143 ms	87144 KB	Output is correct
45	Correct	1128 ms	87228 KB	Output is correct
46	Correct	1142 ms	83964 KB	Output is correct
47	Correct	1201 ms	83612 KB	Output is correct
48	Correct	1121 ms	83576 KB	Output is correct
49	Correct	1148 ms	85648 KB	Output is correct
50	Correct	1246 ms	85052 KB	Output is correct
51	Correct	1209 ms	85148 KB	Output is correct
52	Correct	1196 ms	82580 KB	Output is correct
53	Correct	1199 ms	82232 KB	Output is correct
54	Correct	1189 ms	82264 KB	Output is correct
55	Correct	1234 ms	84084 KB	Output is correct

답안 #418764

Compilation message

Subtask #1 5.0 / 5.0

Subtask #2 14.0 / 14.0

Subtask #3 27.0 / 27.0

Subtask #4 54.0 / 54.0

Subtask #1
5.0 / 5.0

Subtask #2
14.0 / 14.0

Subtask #3
27.0 / 27.0

Subtask #4
54.0 / 54.0