Submission #908202

#	Time	Username	Problem	Language	Result	Execution time	Memory
908202		arashMLG	Triple Jump (JOI19_jumps)	C++17	27 / 100	104 ms	75456 KiB

jumps

#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];
	
	Seg() {
		fill(t,t+(N<<2),0);
	}
	
	void clear() {
		fill(t,t+(N<<2),0);
	}

	void upd(int pos,int x,int v=1,int tl=1,int tr= N) {
		if(tr-tl==1) {
			t[v] = max(t[v],x);
			return;
		}	
		int mid=(tl+tr)/2;
		if(pos<mid)
			upd(pos,x,lc,tl,mid);
		else
			upd(pos,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];
		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,mx;

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];
		mx.upd(i,a[i]);
	}
	cin>>q;
	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]]);
		}
		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]]);
		}
	}
	int ans= 0;
	for(int i = 1; i<= n ; i ++) {
		Mx[i] = max(Mx[i],Mx[i-1]);
		ans = max(ans,a[i] + Mx[i]);
	}
	cout<<ans<< '\n';
	return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 27 / 27
• Subtask 4: 0 / 54