Submission #1096684

#	Time	Username	Problem	Language	Result	Execution time	Memory
1096684		nguyenvu	Triple Jump (JOI19_jumps)	C++14	5 / 100	4069 ms	1880 KiB

jumps

#include <bits/stdc++.h>
#define ll long long
using namespace std;

int n,m;
int a[500007];

namespace sub1 {

  bool check() {
    return m!=1;
  }

  int st[2000007];

  void build(int id, int l, int r) {
    if (l == r) {
      st[id] = a[l];
      return;
    }

    int mid = (l + r) >> 1;
    build(2*id,l,mid);
    build(2*id+1,mid+1,r);

    st[id] = max(st[2*id],st[2*id+1]);
  }

  int get(int id, int l, int r, int u, int v) {
    if (l > v || u > r) return -1;
    if (u <= l && r <= v) return st[id];

    int mid = (l + r) >> 1;
    return max(get(2*id,l,mid,u,v),get(2*id+1,mid+1,r,u,v));
  }

  void solve() {
    build(1,1,n);

    while (m--) {
      int l,r;
      cin >> l >> r;

      ll res = 0;
      for (int i=l; i<=r; i++) {
        for (int j=i+1; 2*j-i<=r; j++) {
          res = max(res,1ll*a[i]+a[j]+get(1,1,n,2*j-i,r));
        }
      }

      cout << res << '\n';
    }
  }
}

namespace sub2 {
  bool check() {
    return m == 1;
  }

  int mx[500007];

  void solve() {
    int l,r;
    cin >> l >> r;

    for (int i=r; i>=l; i--) {
      mx[i] = max(mx[i+1],a[i]);
    }

    ll res = 0;
    for (int i=l; i<=r; i++) {
      for (int j=i+1; 2*j-i<=r; j++) {
        res = max(res,1ll*a[i]+a[j]+mx[2*j-i]);
      }
    }

    cout << res;
  }
}

int main() {

  ios_base::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);


  cin >> n;
  for (int i=1; i<=n; i++) {
    cin >> a[i];
  }

  cin >> m;

  if (sub1::check()) {
    sub1::solve();
    return 0;
  }

  if (sub2::check()) {
    sub2::solve();
    return 0;
  }

  return 0;
}

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