oj.uz

답안 #242375

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
242375 2020-06-27T12:24:09 Z errorgorn 3단 점프 (JOI19_jumps) C++14
46 / 100
 849 ms 102204 KB 
//雪花飄飄北風嘯嘯
//天地一片蒼茫
 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/rope>
using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ii,ll>
#define fi first
#define se second
#define endl '\n'
#define debug(x) cout << #x << " is " << x << endl;
 
#define rep(x,start,end) for(auto x=(start)-((start)>(end));x!=(end)-((start)>(end));((start)<(end)?x++:x--))
#define all(x) (x).begin(),(x).end()
#define sz(x) (int)(x).size()
 
ll MAX(ll a){return a;}
ll MIN(ll a){return a;}
template<typename... Args>
ll MAX(ll a,Args... args){return max(a,MAX(args...));}
template<typename... Args>
ll MIN(ll a,Args... args){return min(a,MIN(args...));}
 
#define indexed_set tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update>
 
mt19937 rng(chrono::system_clock::now().time_since_epoch().count());
 
int n,q;
ll arr[500005];
 
vector<int> stk;
 
vector<ii> good;
 
struct Q{
	int l,r;
	int idx;
	
	Q(int a,int b,int c){
		l=a,r=b,idx=c;
	}
};
 
vector<Q> queries;
 
ll ans[500005];
 
struct dat{
	ll ab=-1e18,c=0,abc=0;
};
 
dat merge(dat i,dat j){
	dat res;
	
	res.c=max(i.c,j.c);
	res.ab=max(i.ab,j.ab);
	res.abc=MAX(i.abc,j.abc,i.ab+j.c);
	
	return res;
}
 
struct node{
	int s,e,m;
	dat val;
	node *l,*r;
	
	node (int _s,int _e){
		s=_s,e=_e,m=s+e>>1;
		
		if (s!=e){
			l=new node(s,m);
			r=new node(m+1,e);
			val=merge(l->val,r->val);
		}
		else{
			val.c=arr[s];
		}
	}
	
	void update(int i,ll j){
		if (s==e) val.ab=max(val.ab,j);
		else{
			if (i<=m) l->update(i,j);
			else r->update(i,j);
			
			val=merge(l->val,r->val);
		}
	}
	
	dat query(int i,int j){
		if (s==i && e==j) return val;
		else if (j<=m) return l->query(i,j);
		else if (m<i) return r->query(i,j);
		else return merge(l->query(i,m),r->query(m+1,j));
	}
} *root;
 
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	
	cin>>n;
	rep(x,0,n) cin>>arr[x];
	
	root=new node(0,500005);
	
	rep(x,0,n){
		while (!stk.empty() && arr[stk.back()]<=arr[x]){
			good.push_back({stk.back(),x});
			stk.pop_back();
		}
		
		if (!stk.empty()) good.push_back({stk.back(),x});
		stk.push_back(x);
	}
	
	cin>>q;
	int a,b;
	rep(x,0,q){
		cin>>a>>b;
		a--,b--;
		queries.push_back(Q(a,b,x));
	}
	
	sort(all(good),[](ii i,ii j){
		return i.fi<j.fi;
	});
	
	sort(all(queries),[](Q &i,Q &j){
		return i.l>j.l;
	});
	
	for (auto &it:queries){
		while (!good.empty() && it.l<=good.back().fi){
			int pos=good.back().se*2-good.back().fi-1;
			
			//cout<<pos<<" "<<good.back().fi<<" "<<good.back().se<<endl;
			if (pos<200005) root->update(pos,arr[good.back().fi]+arr[good.back().se]);
			
			good.pop_back();
		}
		
		ans[it.idx]=root->query(0,it.r).abc;
	}
	
	rep(x,0,q) cout<<ans[x]<<endl;
}

Compilation message

jumps.cpp: In constructor 'node::node(int, int)':
jumps.cpp:74:16: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   s=_s,e=_e,m=s+e>>1;
               ~^~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 60 ms 62968 KB Output is correct
2 Correct 60 ms 62968 KB Output is correct
3 Correct 58 ms 62968 KB Output is correct
4 Correct 62 ms 62968 KB Output is correct
5 Correct 57 ms 62968 KB Output is correct
6 Correct 60 ms 62968 KB Output is correct
7 Correct 58 ms 62968 KB Output is correct
8 Correct 62 ms 62968 KB Output is correct
9 Correct 62 ms 62968 KB Output is correct
10 Correct 70 ms 62968 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 60 ms 62968 KB Output is correct
2 Correct 60 ms 62968 KB Output is correct
3 Correct 58 ms 62968 KB Output is correct
4 Correct 62 ms 62968 KB Output is correct
5 Correct 57 ms 62968 KB Output is correct
6 Correct 60 ms 62968 KB Output is correct
7 Correct 58 ms 62968 KB Output is correct
8 Correct 62 ms 62968 KB Output is correct
9 Correct 62 ms 62968 KB Output is correct
10 Correct 70 ms 62968 KB Output is correct
11 Correct 307 ms 78296 KB Output is correct
12 Correct 293 ms 78064 KB Output is correct
13 Correct 322 ms 78068 KB Output is correct
14 Correct 305 ms 78168 KB Output is correct
15 Correct 289 ms 78168 KB Output is correct
16 Correct 293 ms 77504 KB Output is correct
17 Correct 291 ms 77528 KB Output is correct
18 Correct 310 ms 77528 KB Output is correct
19 Correct 291 ms 78044 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 179 ms 72932 KB Output is correct
2 Correct 126 ms 68840 KB Output is correct
3 Correct 136 ms 69736 KB Output is correct
4 Correct 184 ms 72932 KB Output is correct
5 Correct 202 ms 72932 KB Output is correct
6 Correct 185 ms 72932 KB Output is correct
7 Correct 177 ms 72932 KB Output is correct
8 Correct 179 ms 72936 KB Output is correct
9 Correct 187 ms 72932 KB Output is correct

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 60 ms 62968 KB Output is correct
2 Correct 60 ms 62968 KB Output is correct
3 Correct 58 ms 62968 KB Output is correct
4 Correct 62 ms 62968 KB Output is correct
5 Correct 57 ms 62968 KB Output is correct
6 Correct 60 ms 62968 KB Output is correct
7 Correct 58 ms 62968 KB Output is correct
8 Correct 62 ms 62968 KB Output is correct
9 Correct 62 ms 62968 KB Output is correct
10 Correct 70 ms 62968 KB Output is correct
11 Correct 307 ms 78296 KB Output is correct
12 Correct 293 ms 78064 KB Output is correct
13 Correct 322 ms 78068 KB Output is correct
14 Correct 305 ms 78168 KB Output is correct
15 Correct 289 ms 78168 KB Output is correct
16 Correct 293 ms 77504 KB Output is correct
17 Correct 291 ms 77528 KB Output is correct
18 Correct 310 ms 77528 KB Output is correct
19 Correct 291 ms 78044 KB Output is correct
20 Correct 179 ms 72932 KB Output is correct
21 Correct 126 ms 68840 KB Output is correct
22 Correct 136 ms 69736 KB Output is correct
23 Correct 184 ms 72932 KB Output is correct
24 Correct 202 ms 72932 KB Output is correct
25 Correct 185 ms 72932 KB Output is correct
26 Correct 177 ms 72932 KB Output is correct
27 Correct 179 ms 72936 KB Output is correct
28 Correct 187 ms 72932 KB Output is correct
29 Incorrect 849 ms 102204 KB Output isn't correct
30 Halted 0 ms 0 KB -