oj.uz

답안 #242269

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
242269 2020-06-27T07:55:27 Z oolimry 3단 점프 (JOI19_jumps) C++14
100 / 100
 1055 ms 131136 KB 
#include <bits/stdc++.h>
#define a first
#define b second
#define ab first
#define value second
#define r first
#define id second
#define int long long
using namespace std;
typedef pair<int,int> ii;

const int inf = 102345678901;
const int N = 1<<19;
int arr[N];
int ans[N];
vector<ii> updates[N];
vector<ii> queries[N];

struct node{ int c, ab, abc; };
node tree[2*N];

node relax(node L, node R){
	return { max(L.c, R.c), max(L.ab, R.ab), max(L.ab+R.c, max(L.abc, R.abc)) };
}

void init(){
	for(int i = N;i < 2*N;i++) tree[i] = {arr[i-N], -inf, -inf};
	for(int i = N-1;i >= 1;i--) tree[i] = relax(tree[i<<1], tree[i<<1|1]);
}

void update(int i, int ab){
	i += N;
	
	tree[i].ab = max(tree[i].ab, ab);
	tree[i].abc = max(tree[i].ab + tree[i].c, tree[i].abc);
	
	for(i >>= 1;i > 0;i >>= 1) tree[i] = relax(tree[i<<1], tree[i<<1|1]);
}

int query(int l, int r){
	node L = {-inf,-inf,-inf};
	node R = {-inf,-inf,-inf};
	
	for(l += N, r += N;l < r;l >>= 1, r >>= 1){
		if(l&1) L = relax(L, tree[l++]);
		if(r&1) R = relax(tree[--r], R);
	}
	
	return relax(L,R).abc;
}

signed main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	
	int n; cin >> n;
	for(int i = 0;i < n;i++) cin >> arr[i];
	
	vector<ii> goodpairs;
	stack<int> S;
	for(int i = 0;i < n;i++){
		while(!S.empty()){
			int top = S.top();
			goodpairs.push_back(ii(top,i));
			
			if(arr[i] >= arr[top]) S.pop();
			else break;
		}
		S.push(i);
	}
	
	for(ii p : goodpairs){
		int ab = p.b * 2 - p.a;
		if(ab < n) updates[p.a].push_back(ii(ab, arr[p.a] + arr[p.b]));
	}
	
	int Q; cin >> Q;
	
	for(int q = 0;q < Q;q++){
		int l, r; cin >> l >> r; l--; r--;
		queries[l].push_back(ii(r,q));
	}
	
	init();
	
	for(int l = n-1;l >= 0;l--){
		for(ii u : updates[l]){
			update(u.ab, u.value);
		}
		
		for(ii q : queries[l]){
			int r = q.r;
			ans[q.id] = query(l, r+1);
		}
	}
	
	for(int q = 0;q < Q;q++) cout << ans[q] << "\n";
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 49664 KB Output is correct
2 Correct 34 ms 49656 KB Output is correct
3 Correct 34 ms 49656 KB Output is correct
4 Correct 34 ms 49656 KB Output is correct
5 Correct 35 ms 49656 KB Output is correct
6 Correct 37 ms 49656 KB Output is correct
7 Correct 35 ms 49664 KB Output is correct
8 Correct 35 ms 49656 KB Output is correct
9 Correct 35 ms 49656 KB Output is correct
10 Correct 34 ms 49664 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 49664 KB Output is correct
2 Correct 34 ms 49656 KB Output is correct
3 Correct 34 ms 49656 KB Output is correct
4 Correct 34 ms 49656 KB Output is correct
5 Correct 35 ms 49656 KB Output is correct
6 Correct 37 ms 49656 KB Output is correct
7 Correct 35 ms 49664 KB Output is correct
8 Correct 35 ms 49656 KB Output is correct
9 Correct 35 ms 49656 KB Output is correct
10 Correct 34 ms 49664 KB Output is correct
11 Correct 252 ms 74424 KB Output is correct
12 Correct 246 ms 74232 KB Output is correct
13 Correct 234 ms 74232 KB Output is correct
14 Correct 248 ms 74360 KB Output is correct
15 Correct 281 ms 74544 KB Output is correct
16 Correct 254 ms 73848 KB Output is correct
17 Correct 272 ms 73808 KB Output is correct
18 Correct 253 ms 73720 KB Output is correct
19 Correct 245 ms 74336 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 203 ms 69472 KB Output is correct
2 Correct 127 ms 62304 KB Output is correct
3 Correct 128 ms 63916 KB Output is correct
4 Correct 209 ms 69460 KB Output is correct
5 Correct 214 ms 69460 KB Output is correct
6 Correct 195 ms 68800 KB Output is correct
7 Correct 203 ms 68692 KB Output is correct
8 Correct 195 ms 68692 KB Output is correct
9 Correct 197 ms 69076 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 34 ms 49664 KB Output is correct
2 Correct 34 ms 49656 KB Output is correct
3 Correct 34 ms 49656 KB Output is correct
4 Correct 34 ms 49656 KB Output is correct
5 Correct 35 ms 49656 KB Output is correct
6 Correct 37 ms 49656 KB Output is correct
7 Correct 35 ms 49664 KB Output is correct
8 Correct 35 ms 49656 KB Output is correct
9 Correct 35 ms 49656 KB Output is correct
10 Correct 34 ms 49664 KB Output is correct
11 Correct 252 ms 74424 KB Output is correct
12 Correct 246 ms 74232 KB Output is correct
13 Correct 234 ms 74232 KB Output is correct
14 Correct 248 ms 74360 KB Output is correct
15 Correct 281 ms 74544 KB Output is correct
16 Correct 254 ms 73848 KB Output is correct
17 Correct 272 ms 73808 KB Output is correct
18 Correct 253 ms 73720 KB Output is correct
19 Correct 245 ms 74336 KB Output is correct
20 Correct 203 ms 69472 KB Output is correct
21 Correct 127 ms 62304 KB Output is correct
22 Correct 128 ms 63916 KB Output is correct
23 Correct 209 ms 69460 KB Output is correct
24 Correct 214 ms 69460 KB Output is correct
25 Correct 195 ms 68800 KB Output is correct
26 Correct 203 ms 68692 KB Output is correct
27 Correct 195 ms 68692 KB Output is correct
28 Correct 197 ms 69076 KB Output is correct
29 Correct 953 ms 128168 KB Output is correct
30 Correct 770 ms 109960 KB Output is correct
31 Correct 762 ms 114204 KB Output is correct
32 Correct 1055 ms 127900 KB Output is correct
33 Correct 985 ms 127876 KB Output is correct
34 Correct 1046 ms 125520 KB Output is correct
35 Correct 973 ms 125284 KB Output is correct
36 Correct 938 ms 125456 KB Output is correct
37 Correct 952 ms 126784 KB Output is correct
38 Correct 684 ms 130496 KB Output is correct
39 Correct 705 ms 130624 KB Output is correct
40 Correct 681 ms 127296 KB Output is correct
41 Correct 655 ms 126912 KB Output is correct
42 Correct 663 ms 126736 KB Output is correct
43 Correct 668 ms 128448 KB Output is correct
44 Correct 707 ms 131008 KB Output is correct
45 Correct 697 ms 130760 KB Output is correct
46 Correct 679 ms 127680 KB Output is correct
47 Correct 716 ms 127296 KB Output is correct
48 Correct 702 ms 127372 KB Output is correct
49 Correct 697 ms 129196 KB Output is correct
50 Correct 784 ms 131120 KB Output is correct
51 Correct 799 ms 131136 KB Output is correct
52 Correct 746 ms 128704 KB Output is correct
53 Correct 796 ms 128368 KB Output is correct
54 Correct 745 ms 128192 KB Output is correct
55 Correct 766 ms 129860 KB Output is correct