oj.uz

답안 #242370

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
242370 2020-06-27T12:06:37 Z errorgorn 3단 점프 (JOI19_jumps) C++14
32 / 100
 216 ms 69084 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[200005];
 
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;

int ans[200005];

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(0,200005);
	
	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 26 ms 25344 KB Output is correct
2 Correct 27 ms 25464 KB Output is correct
3 Correct 27 ms 25472 KB Output is correct
4 Correct 26 ms 25336 KB Output is correct
5 Correct 27 ms 25344 KB Output is correct
6 Correct 27 ms 25472 KB Output is correct
7 Correct 28 ms 25472 KB Output is correct
8 Correct 28 ms 25464 KB Output is correct
9 Correct 27 ms 25344 KB Output is correct
10 Correct 26 ms 25336 KB Output is correct

Subtask #2
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 25344 KB Output is correct
2 Correct 27 ms 25464 KB Output is correct
3 Correct 27 ms 25472 KB Output is correct
4 Correct 26 ms 25336 KB Output is correct
5 Correct 27 ms 25344 KB Output is correct
6 Correct 27 ms 25472 KB Output is correct
7 Correct 28 ms 25472 KB Output is correct
8 Correct 28 ms 25464 KB Output is correct
9 Correct 27 ms 25344 KB Output is correct
10 Correct 26 ms 25336 KB Output is correct
11 Runtime error 216 ms 69084 KB Execution killed with signal 11 (could be triggered by violating memory limits)
12 Halted 0 ms 0 KB -

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 145 ms 35812 KB Output is correct
2 Correct 99 ms 31848 KB Output is correct
3 Correct 99 ms 32744 KB Output is correct
4 Correct 143 ms 35812 KB Output is correct
5 Correct 141 ms 35812 KB Output is correct
6 Correct 141 ms 35812 KB Output is correct
7 Correct 134 ms 35940 KB Output is correct
8 Correct 133 ms 35896 KB Output is correct
9 Correct 142 ms 35812 KB Output is correct

Subtask #4
0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 25344 KB Output is correct
2 Correct 27 ms 25464 KB Output is correct
3 Correct 27 ms 25472 KB Output is correct
4 Correct 26 ms 25336 KB Output is correct
5 Correct 27 ms 25344 KB Output is correct
6 Correct 27 ms 25472 KB Output is correct
7 Correct 28 ms 25472 KB Output is correct
8 Correct 28 ms 25464 KB Output is correct
9 Correct 27 ms 25344 KB Output is correct
10 Correct 26 ms 25336 KB Output is correct
11 Runtime error 216 ms 69084 KB Execution killed with signal 11 (could be triggered by violating memory limits)
12 Halted 0 ms 0 KB -