Submission #972652

#	Time	Username	Problem	Language	Result	Execution time	Memory
972652		OAleksa	Triple Jump (JOI19_jumps)	C++14	0 / 100	26 ms	9948 KiB

jumps

#include <bits/stdc++.h>
#define f first
#define s second
#define int long long
using namespace std;

signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int tt = 1;
  //cin >> tt;
  while (tt--) {
		int n;
		cin >> n;
		vector<int> a(n);
		for (int i = 0;i < n;i++) 
			cin >> a[i];
		int q;
		cin >> q;
		while (q--) {
			int l, r;
			cin >> l >> r;
			--l, --r;
			vector<int> ll(n), rr(n);
			vector<int> st;
			for (int i = l;i <= r;i++) {
				while (!st.empty() && a[st.back()] <= a[i])
					st.pop_back();
				if (!st.empty())
					ll[i] = st.back();
				else
					ll[i] = -1;
				st.push_back(i);
			}
			st.clear();
			for (int i = r;i >= l;i--) {
				while (!st.empty() && a[st.back()] <= a[i])
					st.pop_back();
				if (!st.empty())
					rr[i] = st.back();
				else
					rr[i] = -1;
				st.push_back(i);
			}
			vector<int> p(n + 1);
			for (int i = r;i >= l;i--)
				p[i] = max(p[i + 1], a[i]);
			int ans = 0;
			for (int i = l;i <= r;i++) {
				if (rr[i] == -1)
					continue;
				int x = rr[i] - i;
				int j = rr[i] + x;
				if (j <= r)
					ans = max(ans, a[i] + a[rr[i]] + p[j]);
			}
			for (int i = l;i <= r;i++) {
				if (ll[i] == -1)	
					continue;
				int x = i - ll[i];
				int j = i + x;
				if (j <= r)
					ans = max(ans, a[i] + a[ll[i]] + p[j]);
			}
			cout << ans << '\n';
		}
  }
  return 0;
}

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