oj.uz

Submission #208617

# Submission time Handle Problem Language Result Execution time Memory
208617 2020-03-11T22:10:45 Z super_j6 Triple Jump (JOI19_jumps) C++14
100 / 100
 1349 ms 122616 KB 
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <vector>
#include <stack>
using namespace std;
#define endl '\n'
#define pi pair<int, int>
#define pii pair<int, pi>
#define f first
#define s second

struct segTree{
	int l, r;
	segTree *left, *right;
	pii val = {0, {0, 0}};
	
	segTree(int a, int b){
		l = a;
		r = b;
		
		if(l != r){
			int mid = (l + r) / 2;
			left = new segTree(l, mid);
			right = new segTree(mid + 1, r);
		}
	}
	
	void add(int x, pi v){
		if(x < l || r < x) return;
		if(l == r){
			val.s.f = max(val.s.f, v.f);
			val.s.s = max(val.s.s, v.s);
			val.f = val.s.f + val.s.s;
			return;
		}
		
		left->add(x, v);
		right->add(x, v);
		val.f = max(left->val.s.f + right->val.s.s, max(left->val.f, right->val.f));
		val.s.f = max(left->val.s.f, right->val.s.f);
		val.s.s = max(left->val.s.s, right->val.s.s);
	}
	
	pii qry(int a, int b){
		if(r < a || b < l) return {0, {0, 0}};
		if(a <= l && r <= b) return val;
		
		pii lq = left->qry(a, b), rq = right->qry(a, b);
		return {max(lq.s.f + rq.s.s, max(lq.f, rq.f)), {max(lq.s.f, rq.s.f), max(lq.s.s, rq.s.s)}};
	}
};

const int maxn = 500000;
int n, q;
int a[maxn], b[maxn];
vector<int> p[maxn];
vector<pi> qry[maxn];
int ans[maxn];

int main(){
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	
	cin >> n;
	
	stack<int> stk;
	for(int i = 0; i < n; i++){
		cin >> a[i];
		while(!stk.empty()){
			int j = stk.top(), k = 2 * i - j;
			if(k < n) p[j].push_back(k);
			if(a[j] <= a[i]) stk.pop();
			else break;
		}
		stk.push(i);
	}
	
	cin >> q;
	
	for(int i = 0; i < q; i++){
		int l, r;
		cin >> l >> r;
		l--, r--;
		qry[l].push_back({r, i});
	}
	
	segTree tre(0, n);
	for(int i = n - 1; i >= 0; i--){
		tre.add(i, {0, a[i]});
		for(int j : p[i]) tre.add(j, {a[i] + a[(i + j) / 2], 0});
		for(pi j : qry[i]) ans[j.s] = tre.qry(i, j.f).f;
	}
	
	for(int i = 0; i < q; i++) cout << ans[i] << endl;

	return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 23800 KB Output is correct
2 Correct 19 ms 23928 KB Output is correct
3 Correct 20 ms 23800 KB Output is correct
4 Correct 19 ms 23928 KB Output is correct
5 Correct 19 ms 23800 KB Output is correct
6 Correct 19 ms 23800 KB Output is correct
7 Correct 19 ms 23800 KB Output is correct
8 Correct 20 ms 23800 KB Output is correct
9 Correct 19 ms 23800 KB Output is correct
10 Correct 21 ms 23800 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 23800 KB Output is correct
2 Correct 19 ms 23928 KB Output is correct
3 Correct 20 ms 23800 KB Output is correct
4 Correct 19 ms 23928 KB Output is correct
5 Correct 19 ms 23800 KB Output is correct
6 Correct 19 ms 23800 KB Output is correct
7 Correct 19 ms 23800 KB Output is correct
8 Correct 20 ms 23800 KB Output is correct
9 Correct 19 ms 23800 KB Output is correct
10 Correct 21 ms 23800 KB Output is correct
11 Correct 312 ms 42104 KB Output is correct
12 Correct 305 ms 41976 KB Output is correct
13 Correct 300 ms 42040 KB Output is correct
14 Correct 318 ms 42204 KB Output is correct
15 Correct 318 ms 42104 KB Output is correct
16 Correct 315 ms 41464 KB Output is correct
17 Correct 299 ms 41336 KB Output is correct
18 Correct 305 ms 41336 KB Output is correct
19 Correct 315 ms 42056 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 199 ms 51576 KB Output is correct
2 Correct 144 ms 51492 KB Output is correct
3 Correct 146 ms 52216 KB Output is correct
4 Correct 219 ms 51676 KB Output is correct
5 Correct 201 ms 51756 KB Output is correct
6 Correct 199 ms 50936 KB Output is correct
7 Correct 192 ms 50808 KB Output is correct
8 Correct 194 ms 51064 KB Output is correct
9 Correct 193 ms 51196 KB Output is correct

Subtask #4
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 23800 KB Output is correct
2 Correct 19 ms 23928 KB Output is correct
3 Correct 20 ms 23800 KB Output is correct
4 Correct 19 ms 23928 KB Output is correct
5 Correct 19 ms 23800 KB Output is correct
6 Correct 19 ms 23800 KB Output is correct
7 Correct 19 ms 23800 KB Output is correct
8 Correct 20 ms 23800 KB Output is correct
9 Correct 19 ms 23800 KB Output is correct
10 Correct 21 ms 23800 KB Output is correct
11 Correct 312 ms 42104 KB Output is correct
12 Correct 305 ms 41976 KB Output is correct
13 Correct 300 ms 42040 KB Output is correct
14 Correct 318 ms 42204 KB Output is correct
15 Correct 318 ms 42104 KB Output is correct
16 Correct 315 ms 41464 KB Output is correct
17 Correct 299 ms 41336 KB Output is correct
18 Correct 305 ms 41336 KB Output is correct
19 Correct 315 ms 42056 KB Output is correct
20 Correct 199 ms 51576 KB Output is correct
21 Correct 144 ms 51492 KB Output is correct
22 Correct 146 ms 52216 KB Output is correct
23 Correct 219 ms 51676 KB Output is correct
24 Correct 201 ms 51756 KB Output is correct
25 Correct 199 ms 50936 KB Output is correct
26 Correct 192 ms 50808 KB Output is correct
27 Correct 194 ms 51064 KB Output is correct
28 Correct 193 ms 51196 KB Output is correct
29 Correct 1349 ms 116832 KB Output is correct
30 Correct 1210 ms 116352 KB Output is correct
31 Correct 1182 ms 118208 KB Output is correct
32 Correct 1330 ms 116856 KB Output is correct
33 Correct 1344 ms 116824 KB Output is correct
34 Correct 1313 ms 114664 KB Output is correct
35 Correct 1308 ms 114424 KB Output is correct
36 Correct 1319 ms 114332 KB Output is correct
37 Correct 1312 ms 115808 KB Output is correct
38 Correct 842 ms 122492 KB Output is correct
39 Correct 846 ms 122616 KB Output is correct
40 Correct 812 ms 119160 KB Output is correct
41 Correct 832 ms 118776 KB Output is correct
42 Correct 821 ms 118648 KB Output is correct
43 Correct 862 ms 120568 KB Output is correct
44 Correct 912 ms 122232 KB Output is correct
45 Correct 923 ms 122104 KB Output is correct
46 Correct 893 ms 119032 KB Output is correct
47 Correct 876 ms 118392 KB Output is correct
48 Correct 912 ms 118392 KB Output is correct
49 Correct 873 ms 120440 KB Output is correct
50 Correct 992 ms 120056 KB Output is correct
51 Correct 996 ms 120056 KB Output is correct
52 Correct 991 ms 117624 KB Output is correct
53 Correct 999 ms 117368 KB Output is correct
54 Correct 963 ms 117260 KB Output is correct
55 Correct 976 ms 119032 KB Output is correct