Submission #489449

#	Time	Username	Problem	Language	Result	Execution time	Memory
489449		fhvirus	Triple Jump (JOI19_jumps)	C++17	0 / 100	30 ms	1944 KiB

jumps

#include<bits/stdc++.h>
using namespace std;
typedef long long ll; typedef pair<int, int> pii;
#define ff first
#define ss second
#define pb emplace_back
#define AI(x) begin(x),end(x)
template<class I> bool chmin(I&a, I b){ return a > b ? (a=b, true) : false; }
template<class I> bool chmax(I&a, I b){ return a < b ? (a=b, true) : false; }
#ifdef OWO
#define debug(args...) LKJ("\033[1;32m[ " + string(#args) + " ]\033[0m", args)
template<class I> void LKJ(I&&x){ cerr << x << endl; }
template<class I, class...T> void LKJ(I&&x, T&&...t){ cerr << x << ", "; LKJ(t...); }
template<class I> void OI(I a, I b){ while(a < b) cerr << *a << " \n"[next(a) == b], ++a; }
#else
#define debug(...) 0
#define OI(...) 0
#endif

const int kN = 500005;
int N, Q, A[kN];
int L[kN], R[kN];

void input(){
	cin >> N;
	for(int i = 1; i <= N; ++i)
		cin >> A[i];
	cin >> Q;
	for(int i = 0; i < Q; ++i)
		cin >> L[i] >> R[i];
}

int suf[kN];
int f(int a, int b){
	return A[a] + A[b] + suf[ b + (b-a) ];
}
void solve(){
	suf[N] = A[N];
	for(int i = N-1; i >= 1; --i)
		suf[i] = max(A[i], suf[i+1]);

	int ans = 0;
	deque<int> dq;
	for(int i = 2; i < N; ++i){
		while(!dq.empty() and f(dq.back(), i) <= f(i-1, i))
			dq.pop_back();
		dq.pb(i-1);
		while(dq.size() > 1 and f(dq[0], i) <= f(dq[1], i))
			dq.pop_front();
		chmax(ans, f(dq[0], i));
	}
	cout << ans << '\n';
}

signed main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	input();
	solve();
	return 0;
}

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