oj.uz

답안 #908220

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
908220 2024-01-16T09:51:31 Z arashMLG 3단 점프 (JOI19_jumps) C++17
100 / 100
 1395 ms 145548 KB 
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll>   pll;

const int N = 5e5 + 23;
const ll inf = 1e18;

#define F                  first
#define S                  second
#define pb	               push_back
#define sz(x)              ((int)x.size())
#define kill(x)            cout<<x , exit(0);
#define all(x)             x.begin(),x.end()
#define lc                 (v<<1)
#define rc                 ((v<<1)|1)
#define debug(x)           cerr<< #x << " : " << x << '\n';
#define int               	ll

struct Seg {
	int t[N<<2];
	int mx[N<<2];
	int lz[N<<2];
	
	Seg() {
		for(int i = 0 ; i<(N<<2); i ++) t[i] = mx[i] = lz[i] = 0;
	}
	
	void shift(int v) {
		if(lz[v] == 0) return;
		lz[lc] = max(lz[lc],lz[v]);
		lz[rc] = max(lz[rc],lz[v]);
		t[lc] = max(t[lc],mx[lc] + lz[lc]);
		t[rc] = max(t[rc],mx[rc] + lz[rc]);
		lz[v] = 0;
	}
	
	// khode a[i] ha
	void set(int pos,int x,int v=1,int tl= 1,int tr= N) {
		if(tr-tl == 1) {
			mx[v] = x;
			return;
		}
		int mid=(tl+tr)/2;
		if(pos < mid)
			set(pos,x,lc,tl,mid);
		else
			set(pos,x,rc,mid,tr);
		mx[v] = max(mx[lc],mx[rc]);
	}
	
	void add(int l,int r,int x,int v=1,int tl = 1,int tr= N) {
		if(l > r) return;
		if(l == tl && r ==tr-1) {
			lz[v] = max(lz[v],x);
			t[v] = max(t[v],mx[v] + lz[v]);
			return;
		}
		shift(v);
		int mid=(tl+tr)/2;
		add(l,min(mid-1,r),x,lc,tl,mid);
		add(max(l,mid),r,x,rc,mid,tr);
		t[v] = max(t[lc],t[rc]);
	}
	
	int get(int l,int r,int v=1,int tl=1,int tr = N) {
		if(l >r) return 0;
		if(l == tl && r == tr-1) return t[v];
		shift(v);
		int mid=(tl+tr)/2;
		return max(get(l,min(mid-1,r),lc,tl,mid), get(max(l,mid),r,rc,mid,tr));
	}
	
}seg;

int n,q;
int a[N];
vector<pair<int,int>> Q[N];
vector<pair<int,int>> here[N];
int ans[N];
vector<int> st;
int L[N],R[N];
vector<pair<int,int> > edges;
int Mx[N];

int32_t main() {
	cin>>n;
	for(int i = 1; i<= n ; i ++) {
		cin>>a[i];
		seg.set(i,a[i]);
	}
	cin>>q;
	for(int i = 0 ; i< q; i ++) {
		int l,r; cin>>l>>r;
		Q[l].pb({r,i});	
	}
	st.pb(0);
	for(int i = 1; i<= n ; i++) {
		while(st.back() && a[st.back()] < a[i]) st.pop_back();
		if(sz(st) > 1) {
			L[i] = st.back();
		}
		st.pb(i);
	} st.clear();
	st.pb(0);
	for(int i = n ; i >= 1;i --) {
		while(st.back() && a[st.back()] < a[i]) st.pop_back();
		if(sz(st) > 1) {
			R[i]=  st.back();
		}
		st.pb(i);
	}
	for(int i= 1; i <= n ; i ++) {
		if(R[i] != 0 && R[i] - i + R[i] <= n) {
			//Mx[R[i]-i+R[i]] = max(Mx[R[i]-i +R[i]], a[i] + a[R[i]]);
			here[i].pb({R[i]-i+R[i],a[i] + a[R[i]]});
		}
		if(L[i] != 0 && i-L[i] + i <= n) {
			//Mx[i-L[i]+i] = max(Mx[i-L[i]+i],a[i] + a[L[i]]);
			here[L[i]].pb({i-L[i]+i,a[i] + a[L[i]]});
		}
	}
	for(int i = n; i >= 1; i --) {
		for(auto [l,val] : here[i]) seg.add(l,n,val);
		for(auto [r,id]  : Q[i])    ans[id] = seg.get(i,r);		
	}
	for(int i = 0 ; i< q;i ++) {
		cout<<ans[i] << '\n';
	}
	return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 80008 KB Output is correct
2 Correct 17 ms 79960 KB Output is correct
3 Correct 17 ms 77772 KB Output is correct
4 Correct 17 ms 79964 KB Output is correct
5 Correct 17 ms 79960 KB Output is correct
6 Correct 19 ms 79964 KB Output is correct
7 Correct 17 ms 80216 KB Output is correct
8 Correct 18 ms 79956 KB Output is correct
9 Correct 18 ms 79964 KB Output is correct
10 Correct 18 ms 80216 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 80008 KB Output is correct
2 Correct 17 ms 79960 KB Output is correct
3 Correct 17 ms 77772 KB Output is correct
4 Correct 17 ms 79964 KB Output is correct
5 Correct 17 ms 79960 KB Output is correct
6 Correct 19 ms 79964 KB Output is correct
7 Correct 17 ms 80216 KB Output is correct
8 Correct 18 ms 79956 KB Output is correct
9 Correct 18 ms 79964 KB Output is correct
10 Correct 18 ms 80216 KB Output is correct
11 Correct 341 ms 107124 KB Output is correct
12 Correct 352 ms 105484 KB Output is correct
13 Correct 355 ms 107208 KB Output is correct
14 Correct 345 ms 107160 KB Output is correct
15 Correct 366 ms 107280 KB Output is correct
16 Correct 348 ms 106592 KB Output is correct
17 Correct 352 ms 106548 KB Output is correct
18 Correct 365 ms 106256 KB Output is correct
19 Correct 346 ms 107088 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 225 ms 97456 KB Output is correct
2 Correct 154 ms 94856 KB Output is correct
3 Correct 144 ms 94916 KB Output is correct
4 Correct 232 ms 97480 KB Output is correct
5 Correct 226 ms 97416 KB Output is correct
6 Correct 233 ms 97212 KB Output is correct
7 Correct 214 ms 97104 KB Output is correct
8 Correct 212 ms 97160 KB Output is correct
9 Correct 232 ms 97616 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 80008 KB Output is correct
2 Correct 17 ms 79960 KB Output is correct
3 Correct 17 ms 77772 KB Output is correct
4 Correct 17 ms 79964 KB Output is correct
5 Correct 17 ms 79960 KB Output is correct
6 Correct 19 ms 79964 KB Output is correct
7 Correct 17 ms 80216 KB Output is correct
8 Correct 18 ms 79956 KB Output is correct
9 Correct 18 ms 79964 KB Output is correct
10 Correct 18 ms 80216 KB Output is correct
11 Correct 341 ms 107124 KB Output is correct
12 Correct 352 ms 105484 KB Output is correct
13 Correct 355 ms 107208 KB Output is correct
14 Correct 345 ms 107160 KB Output is correct
15 Correct 366 ms 107280 KB Output is correct
16 Correct 348 ms 106592 KB Output is correct
17 Correct 352 ms 106548 KB Output is correct
18 Correct 365 ms 106256 KB Output is correct
19 Correct 346 ms 107088 KB Output is correct
20 Correct 225 ms 97456 KB Output is correct
21 Correct 154 ms 94856 KB Output is correct
22 Correct 144 ms 94916 KB Output is correct
23 Correct 232 ms 97480 KB Output is correct
24 Correct 226 ms 97416 KB Output is correct
25 Correct 233 ms 97212 KB Output is correct
26 Correct 214 ms 97104 KB Output is correct
27 Correct 212 ms 97160 KB Output is correct
28 Correct 232 ms 97616 KB Output is correct
29 Correct 1361 ms 142820 KB Output is correct
30 Correct 1138 ms 136824 KB Output is correct
31 Correct 1144 ms 136792 KB Output is correct
32 Correct 1377 ms 142972 KB Output is correct
33 Correct 1395 ms 142912 KB Output is correct
34 Correct 1308 ms 140812 KB Output is correct
35 Correct 1325 ms 140168 KB Output is correct
36 Correct 1318 ms 140304 KB Output is correct
37 Correct 1335 ms 141932 KB Output is correct
38 Correct 1052 ms 145416 KB Output is correct
39 Correct 1064 ms 145548 KB Output is correct
40 Correct 998 ms 142200 KB Output is correct
41 Correct 992 ms 141688 KB Output is correct
42 Correct 966 ms 141672 KB Output is correct
43 Correct 1018 ms 143440 KB Output is correct
44 Correct 1091 ms 145092 KB Output is correct
45 Correct 1103 ms 145172 KB Output is correct
46 Correct 1069 ms 141948 KB Output is correct
47 Correct 1065 ms 141664 KB Output is correct
48 Correct 1044 ms 141676 KB Output is correct
49 Correct 1037 ms 143544 KB Output is correct
50 Correct 1194 ms 144096 KB Output is correct
51 Correct 1171 ms 144340 KB Output is correct
52 Correct 1116 ms 142084 KB Output is correct
53 Correct 1123 ms 141608 KB Output is correct
54 Correct 1175 ms 141692 KB Output is correct
55 Correct 1136 ms 143444 KB Output is correct