oj.uz

답안 #1087219

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1087219 2024-09-12T10:00:57 Z peacebringer1667 3단 점프 (JOI19_jumps) C++17
100 / 100
 659 ms 104532 KB 
#include<bits/stdc++.h>
#define ll long long
#define ldb long double
#define fi first
#define se second
#define sza(a) (int)a.size()
#define pir pair<int,int>
#define pirll pair<ll,ll>
#define usa unsigned int
#define pirusa pair <unsigned int,unsigned int>
using namespace std;
const int maxn = 5e5 + 5;

template <typename T> void maxi(T &x,T y){x = max(x,y);}
struct segment_tree{
	unsigned int seg[4*maxn],lazy[4*maxn],base[4*maxn];
	
	void downlazy(int v,int l,int r){
		if (!lazy[v]) return;
		seg[v] = max(seg[v],base[v] + lazy[v]);
		
		if (l != r){
			maxi(lazy[2*v + 1],lazy[v]);
			maxi(lazy[2*v + 2],lazy[v]); 
		}
		lazy[v] = 0;
	}
	
	void base_update(int l,int r,int v,int p,int val){
		if (l > p || r < p) return;
		if (l == r){
			base[v] = val;
			return;
		}
		
		int w = (l + r)/2;
		base_update(l,w,2*v + 1,p,val);
		base_update(w + 1,r,2*v + 2,p,val);
		base[v] = max(base[2*v + 1],base[2*v + 2]);
	}
	
	void update(int l,int r,int v,int lx,int rx,unsigned int val){
		downlazy(v,l,r);
		if (l > rx || r < lx) return;
		if (l >= lx && r <= rx){
			lazy[v] = max(lazy[v],val);
			downlazy(v,l,r);
			return;
		}
		
		int w = (l + r)/2;
		update(l,w,2*v + 1,lx,rx,val);
		update(w + 1,r,2*v + 2,lx,rx,val);
		seg[v] = max(seg[2*v + 1],seg[2*v + 2]);
	}
	
	unsigned int calc(int l,int r,int v,int lx,int rx){
		downlazy(v,l,r);
		if (l > rx || r < lx) return 0;
		if (l >= lx && r <= rx) return seg[v];
		
		int w = (l + r)/2;
		return max(calc(l,w,2*v + 1,lx,rx),calc(w + 1,r,2*v + 2,lx,rx));
	}
} seg;

vector <vector<pirusa>> vec(maxn);
usa res[maxn];
int a[maxn],L[maxn],R[maxn];
vector <vector<pir>> Q(maxn);
////////
int input(int n){
	int q;
	for (int i = 1 ; i <= n ; i++) cin >> a[i];
	cin >> q;
	for (int i = 1 ; i <= q ; i++){
		cin >> L[i] >> R[i];
	}
	return q;
}
namespace sub1{
	const int N = 5e3 + 5;
	
	bool check(int n,int q){
		return (n <= 5000);
	}
	
	unsigned int f[N][N];
	
	void prepare(int n){
		for (int l = 1 ; l < n - 1 ; l++){
			int x = a[l + 1];
			for (int r = l + 2 ; r <= n ; r++){
				x = max(x,a[(l + r)/2]);
				f[l][r] = max(f[l][r],(unsigned int)(a[l] + x + a[r]));
			}
		}
		
		for (int len = 3 ; len <= n ; len++)
		  for (int i = 1 ; i <= n - len + 1 ; i++){
		  	int l = i,r = i + len - 1;
		  	f[l][r] = max(f[l][r],max(f[l + 1][r],f[l][r - 1]));
		  }
	}
	
	void solve(int n,int q){
		prepare(n);
		
		for (int i = 1 ; i <= q ; i++)
		  cout << f[L[i]][R[i]] << "\n";
	}
}
///////


void prepare(int n){
	deque <int> dq;
	
	for (int i = n ; i > 0 ; i--){
		while (dq.size()){
			int l = i,r = dq.back();
		    
		    if (2*r - l <= n)
		      vec[l].push_back({2*r - l,(usa)a[i] + (usa)a[dq.back()]});
			
			if (a[dq.back()] <= a[i])
			  dq.pop_back();
		    else break;
		}
		
		dq.push_back(i);
	}
	
	for (int i = 1 ; i <= n ; i++)
	  seg.base_update(1,n,0,i,a[i]);
}

void prepare_query(int q){
	for (int i = 1 ; i <= q ; i++)
	  Q[L[i]].push_back({R[i],i});
}

void solve(int n,int q){
	for (int i = n ; i > 0 ; i--){
		for (pirusa P : vec[i]){
			int l = P.fi;usa val = P.se;
			seg.update(1,n,0,l,n,val);
		}
		
		for (pir query : Q[i]){
			int l = i,r = query.fi,id = query.se;
			res[id] = seg.calc(1,n,0,l,r);
		}
	}
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	//freopen("JUMP.inp","r",stdin);
//	freopen("JUMP.out","w",stdout);
	int n,q;
	cin >> n;
	q = input(n);
	
	if (sub1::check(n,q)){
		sub1::solve(n,q);
		return 0;
	}
	
	prepare(n);
	prepare_query(q);
	solve(n,q);
	
	for (int i = 1 ; i <= q ; i++) cout << res[i] << "\n";

	return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23976 KB Output is correct
2 Correct 10 ms 24156 KB Output is correct
3 Correct 10 ms 24360 KB Output is correct
4 Correct 9 ms 24156 KB Output is correct
5 Correct 11 ms 24156 KB Output is correct
6 Correct 11 ms 24240 KB Output is correct
7 Correct 10 ms 24156 KB Output is correct
8 Correct 10 ms 24156 KB Output is correct
9 Correct 10 ms 24156 KB Output is correct
10 Correct 11 ms 24188 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23976 KB Output is correct
2 Correct 10 ms 24156 KB Output is correct
3 Correct 10 ms 24360 KB Output is correct
4 Correct 9 ms 24156 KB Output is correct
5 Correct 11 ms 24156 KB Output is correct
6 Correct 11 ms 24240 KB Output is correct
7 Correct 10 ms 24156 KB Output is correct
8 Correct 10 ms 24156 KB Output is correct
9 Correct 10 ms 24156 KB Output is correct
10 Correct 11 ms 24188 KB Output is correct
11 Correct 233 ms 104532 KB Output is correct
12 Correct 218 ms 104280 KB Output is correct
13 Correct 225 ms 104272 KB Output is correct
14 Correct 218 ms 104532 KB Output is correct
15 Correct 211 ms 104480 KB Output is correct
16 Correct 224 ms 103788 KB Output is correct
17 Correct 222 ms 103760 KB Output is correct
18 Correct 220 ms 103760 KB Output is correct
19 Correct 214 ms 104272 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 117 ms 39964 KB Output is correct
2 Correct 79 ms 39752 KB Output is correct
3 Correct 78 ms 38892 KB Output is correct
4 Correct 120 ms 39980 KB Output is correct
5 Correct 138 ms 40020 KB Output is correct
6 Correct 115 ms 39260 KB Output is correct
7 Correct 113 ms 39248 KB Output is correct
8 Correct 114 ms 39248 KB Output is correct
9 Correct 118 ms 39508 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 23976 KB Output is correct
2 Correct 10 ms 24156 KB Output is correct
3 Correct 10 ms 24360 KB Output is correct
4 Correct 9 ms 24156 KB Output is correct
5 Correct 11 ms 24156 KB Output is correct
6 Correct 11 ms 24240 KB Output is correct
7 Correct 10 ms 24156 KB Output is correct
8 Correct 10 ms 24156 KB Output is correct
9 Correct 10 ms 24156 KB Output is correct
10 Correct 11 ms 24188 KB Output is correct
11 Correct 233 ms 104532 KB Output is correct
12 Correct 218 ms 104280 KB Output is correct
13 Correct 225 ms 104272 KB Output is correct
14 Correct 218 ms 104532 KB Output is correct
15 Correct 211 ms 104480 KB Output is correct
16 Correct 224 ms 103788 KB Output is correct
17 Correct 222 ms 103760 KB Output is correct
18 Correct 220 ms 103760 KB Output is correct
19 Correct 214 ms 104272 KB Output is correct
20 Correct 117 ms 39964 KB Output is correct
21 Correct 79 ms 39752 KB Output is correct
22 Correct 78 ms 38892 KB Output is correct
23 Correct 120 ms 39980 KB Output is correct
24 Correct 138 ms 40020 KB Output is correct
25 Correct 115 ms 39260 KB Output is correct
26 Correct 113 ms 39248 KB Output is correct
27 Correct 114 ms 39248 KB Output is correct
28 Correct 118 ms 39508 KB Output is correct
29 Correct 645 ms 88660 KB Output is correct
30 Correct 553 ms 85424 KB Output is correct
31 Correct 510 ms 85588 KB Output is correct
32 Correct 658 ms 88660 KB Output is correct
33 Correct 623 ms 88660 KB Output is correct
34 Correct 644 ms 86360 KB Output is correct
35 Correct 626 ms 86100 KB Output is correct
36 Correct 659 ms 86148 KB Output is correct
37 Correct 617 ms 87400 KB Output is correct
38 Correct 503 ms 94288 KB Output is correct
39 Correct 489 ms 94544 KB Output is correct
40 Correct 478 ms 90964 KB Output is correct
41 Correct 489 ms 90388 KB Output is correct
42 Correct 483 ms 90456 KB Output is correct
43 Correct 488 ms 92344 KB Output is correct
44 Correct 507 ms 93560 KB Output is correct
45 Correct 533 ms 93820 KB Output is correct
46 Correct 507 ms 90452 KB Output is correct
47 Correct 509 ms 90192 KB Output is correct
48 Correct 509 ms 90104 KB Output is correct
49 Correct 549 ms 92244 KB Output is correct
50 Correct 553 ms 91920 KB Output is correct
51 Correct 579 ms 91728 KB Output is correct
52 Correct 555 ms 89316 KB Output is correct
53 Correct 556 ms 89080 KB Output is correct
54 Correct 549 ms 88916 KB Output is correct
55 Correct 544 ms 90708 KB Output is correct