oj.uz

답안 #335138

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
335138 2020-12-11T08:28:58 Z Mo_TOI_I_am_Garbage 3단 점프 (JOI19_jumps) C++14
100 / 100
 1350 ms 92988 KB 
#include<bits/stdc++.h>
#define int long long int
#define No_TOI_I_am_Garbage ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
int n, a[500050], q;
vector<pair<int, int> > seg;
struct thing {
	int left, right, v1, v2, lz;
} arr[500050 << 2];
void build(int left, int right, int m)
{
	arr[m].left = left; arr[m].right = right;
	arr[m].lz = 0;
	if(left == right)
	{
		arr[m].v1 = arr[m].v2 = a[left];
		return;
	}
	int mid = (left + right) >> 1;
	build(left, mid, m * 2);
	build(mid + 1, right, m * 2 + 1);
	arr[m].v2 = max(arr[m * 2].v2, arr[m * 2 + 1].v2);
	arr[m].v1 = arr[m].v2;
}
void down(int m)
{
	arr[m * 2].v1 = max(arr[m * 2].v1, arr[m * 2].v2 + arr[m].lz);
	arr[m * 2 + 1].v1 = max(arr[m * 2 + 1].v1, arr[m * 2 + 1].v2 + arr[m].lz);
	arr[m * 2].lz = max(arr[m].lz, arr[m * 2].lz);
	arr[m * 2 + 1].lz = max(arr[m].lz, arr[m * 2 + 1].lz);
}
void modify(int left, int right, int x, int m)
{
	if(arr[m].left > right || arr[m].right < left) return;
	if(left <= arr[m].left && arr[m].right <= right)
	{
		arr[m].lz = max(arr[m].lz, x);
		arr[m].v1 = max(arr[m].v1, x + arr[m].v2);
		return;
	}
	down(m);
	modify(left, right, x, m * 2);
	modify(left, right, x, m * 2 + 1);
	arr[m].v1 = max(arr[m * 2].v1, arr[m * 2 + 1].v1);
	arr[m].v2 = max(arr[m * 2].v2, arr[m * 2 + 1].v2);
	return;
}
int search(int left, int right, int m)
{
	if(arr[m].left > right || arr[m].right < left) return 0;
	if(left <= arr[m].left && arr[m].right <= right)
		return arr[m].v1;
	down(m);
	return max(search(left, right, m * 2), search(left, right, m * 2 + 1));
}
struct he {
	int first, second, seq, ans;
} que[500050];
int32_t main()
{
	No_TOI_I_am_Garbage
	cin >> n;
	for(int i=1; i <= n; i ++)
		cin >> a[i];
	deque<int> Q; Q.push_back(1);
	for(int i=2; i <= n; i ++)
	{
		while(!Q.empty() && a[Q.back()] <= a[i])
		{
			int top = Q.back(); Q.pop_back();
			seg.push_back(make_pair(top, i));
		}
		if(!Q.empty()) seg.push_back(make_pair(Q.back(), i));
		Q.push_back(i);
	}
	sort(seg.begin(), seg.end(), [](pair<int, int> x, pair<int, int> y) {
		return x.first > y.first;
	});
	cin >> q;
	for(int i=0; i < q; i ++)
	{
		cin >> que[i].first >> que[i].second;
		que[i].seq = i;
	}
	sort(que, que + q, [](he x, he y) {
		return x.first > y.first;
	});
	build(1, n, 1);
	int ind = 0;
	for(int i=0; i < q; i ++)
	{
		while(ind < seg.size() && seg[ind].first >= que[i].first)
		{
			modify(seg[ind].second * 2 - seg[ind].first, n, a[seg[ind].first] + a[seg[ind].second], 1);
			// cout << seg[ind].second * 2 - seg[ind].first << ' ' << a[seg[ind].first] + a[seg[ind].second] << ' ' << seg[ind].first << ' ' << seg[ind].second << '\n';
			ind ++;
		}
		// cout << '\n';
		que[i].ans = search(que[i].first, que[i].second, 1);
	}
	sort(que, que + q, [](he x, he y) {
		return x.seq < y.seq;
	});
	for(int i=0; i < q; i ++)
		cout << que[i].ans << '\n';
	return 0;
}

Compilation message

jumps.cpp: In function 'int32_t main()':
jumps.cpp:92:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   92 |   while(ind < seg.size() && seg[ind].first >= que[i].first)
      |         ~~~~^~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 416 ms 26864 KB Output is correct
12 Correct 411 ms 26624 KB Output is correct
13 Correct 418 ms 26604 KB Output is correct
14 Correct 416 ms 26736 KB Output is correct
15 Correct 412 ms 26736 KB Output is correct
16 Correct 415 ms 26096 KB Output is correct
17 Correct 417 ms 26080 KB Output is correct
18 Correct 430 ms 26096 KB Output is correct
19 Correct 417 ms 26608 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 222 ms 30544 KB Output is correct
2 Correct 122 ms 27488 KB Output is correct
3 Correct 125 ms 28964 KB Output is correct
4 Correct 228 ms 30544 KB Output is correct
5 Correct 216 ms 30544 KB Output is correct
6 Correct 211 ms 30040 KB Output is correct
7 Correct 215 ms 29788 KB Output is correct
8 Correct 213 ms 29784 KB Output is correct
9 Correct 216 ms 30160 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 416 ms 26864 KB Output is correct
12 Correct 411 ms 26624 KB Output is correct
13 Correct 418 ms 26604 KB Output is correct
14 Correct 416 ms 26736 KB Output is correct
15 Correct 412 ms 26736 KB Output is correct
16 Correct 415 ms 26096 KB Output is correct
17 Correct 417 ms 26080 KB Output is correct
18 Correct 430 ms 26096 KB Output is correct
19 Correct 417 ms 26608 KB Output is correct
20 Correct 222 ms 30544 KB Output is correct
21 Correct 122 ms 27488 KB Output is correct
22 Correct 125 ms 28964 KB Output is correct
23 Correct 228 ms 30544 KB Output is correct
24 Correct 216 ms 30544 KB Output is correct
25 Correct 211 ms 30040 KB Output is correct
26 Correct 215 ms 29788 KB Output is correct
27 Correct 213 ms 29784 KB Output is correct
28 Correct 216 ms 30160 KB Output is correct
29 Correct 1350 ms 92796 KB Output is correct
30 Correct 1044 ms 84840 KB Output is correct
31 Correct 1042 ms 88960 KB Output is correct
32 Correct 1323 ms 92960 KB Output is correct
33 Correct 1297 ms 92732 KB Output is correct
34 Correct 1316 ms 90532 KB Output is correct
35 Correct 1301 ms 90216 KB Output is correct
36 Correct 1301 ms 90172 KB Output is correct
37 Correct 1306 ms 91712 KB Output is correct
38 Correct 1039 ms 92988 KB Output is correct
39 Correct 1025 ms 92988 KB Output is correct
40 Correct 1022 ms 89404 KB Output is correct
41 Correct 1030 ms 88980 KB Output is correct
42 Correct 1018 ms 89048 KB Output is correct
43 Correct 1030 ms 90836 KB Output is correct
44 Correct 1065 ms 92860 KB Output is correct
45 Correct 1056 ms 92860 KB Output is correct
46 Correct 1043 ms 89788 KB Output is correct
47 Correct 1047 ms 89404 KB Output is correct
48 Correct 1034 ms 89452 KB Output is correct
49 Correct 1071 ms 91452 KB Output is correct
50 Correct 1175 ms 92988 KB Output is correct
51 Correct 1126 ms 92988 KB Output is correct
52 Correct 1124 ms 90428 KB Output is correct
53 Correct 1121 ms 90196 KB Output is correct
54 Correct 1110 ms 90172 KB Output is correct
55 Correct 1121 ms 91836 KB Output is correct