Submission #1174993

#	Time	Username	Problem	Language	Result	Execution time	Memory
1174993		Johan	Rainforest Jumps (APIO21_jumps)	C++20	0 / 100	2396 ms	1114112 KiB

jumps

#include "jumps.h"
#include "bits/stdc++.h"
using namespace std;

const int MAX = 3e5 + 6;
const int LOG = 25;
const int inf = 1e9;
const int mod = 1e9 + 7;
const int block = 333;
// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
queue < int > q;
vector < int > d(MAX, -1);
vector < vector < int > > adj(MAX);
void fix(){
  d.assign(MAX, -1);
  while(q.size()) q.pop();
}
void bfs(){
  while(q.size()){
    int v = q.front();
    q.pop();
    for(auto u : adj[v]){
      if(d[u] == -1){
        q.push(u);
        d[u] = d[v] + 1;
      }
    }
  }
}
void init(int N, vector<int> H) {
  int n = N;
  vector < int > h = H;
  for(int i = 0; i < n; i++){
    for(int j = i - 1; j >= 0; j--){
      if(h[j] > h[i])
        adj[i].push_back(j);
    }
    for(int j = i + 1; j < n; j++){
      if(h[j] > h[i])
        adj[i].push_back(j);
    }
  }
}
int minimum_jumps(int A, int B, int C, int D){
  fix();
  for(int i = A; i <= B; i++){
    d[i] = 0;
    q.push(i);
  }
  bfs();
  int mn = inf;
  for(int i = C; i <= D; i++)
    mn = min(mn, d[i]);
  return (mn == inf ? -1 : mn);
}
// signed main(){
  
// }

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