Submission #566899

#	Time	Username	Problem	Language	Result	Execution time	Memory
566899		Turkhuu	Rainforest Jumps (APIO21_jumps)	C++17	33 / 100	4085 ms	23852 KiB

jumps

#include "jumps.h"
#include <bits/stdc++.h>
using namespace std;
const int inf = 1000000000;
int n;
vector<int> a;
vector<vector<int>> g;
void init(int N, vector<int> H){
  n = N, a = H;
  g.resize(n);
  for(int i = 0; i < n; i++){
    a[i]--;
  }
  vector<int> idx(n);
  for(int i = 0; i < n; i++){
    idx[a[i]] = i;
  }
  set<int> s;
  for(int i = n - 1; i >= 0; i--){
    auto j = s.lower_bound(idx[i]);
    if(j != s.end()){
      g[idx[i]].push_back(*j);
    }
    if(j != s.begin()){
      g[idx[i]].push_back(*prev(j));
    }
    s.insert(idx[i]);
  }
}
int minimum_jumps(int A, int B, int C, int D){
  queue<int> q;
  vector<int> d(n, inf);
  for(int i = A; i <= B; i++){
    d[i] = 0;
    q.push(i);
  }
  while(!q.empty()){
    int i = q.front();
    q.pop();
    if(C <= i && i <= D){
      return d[i];
    }
    for(int j : g[i]){
      if(d[i] + 1 < d[j]){
        d[j] = d[i] + 1;
        q.push(j);
      }
    }
  }
  return -1;
}

• Subtask 1: 0 / 4
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 0 / 23
• Subtask 6: 0 / 21
• Subtask 7: 0 / 19