Submission #1047792

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047792		Maite_Morale	Rainforest Jumps (APIO21_jumps)	C++17	0 / 100	4085 ms	123456 KiB

jumps

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define vll vector<ll>
#define MAX 500005
#define oo 1e18
#define pll pair<ll,ll>
#define F first
#define S second

const ll bts=20;
pll v[MAX],p[MAX],s[bts+10][MAX];
ll d[MAX],t[bts+10][MAX];
vll h;
void init(int n, std::vector<int> H) {
    H.push_back(0);
    queue<pair<ll,pll>> q;q.push({n,{0,n-1}});
    d[n]=0;s[0][n]={n,n};
    while(!q.empty()){
        pair<ll,pll> u=q.front();q.pop();
        pair<ll,pll> h1={-1,{u.S.F,u.F-1}};
        pair<ll,pll> h2={-1,{u.F+1,u.S.S}};
        pll mx1={0,n},mx2={0,n};
        for(int i=h1.S.F;i<=h1.S.S;i++){
            mx1=max(mx1,{H[i],i});
        }
        for(int i=h2.S.F;i<=h2.S.S;i++){
            mx2=max(mx2,{H[i],i});
        }
        h1.F=mx1.S;h2.F=mx2.S;
        v[u.F]={h1.F,h2.F};
        if(h1.F!=n){
          q.push(h1);
          d[h1.F]=d[u.F]+1;
          p[h1.F]={h1.S.F-1,h1.S.S+1};
          s[0][h1.F].F=u.S.F-1;
          s[0][h1.F].S=u.F;
        }
        if(h2.F!=n){
          q.push(h2);
          d[h2.F]=d[u.F]+1;
          p[h2.F]={h2.S.F-1,h2.S.S+1};
          s[0][h2.F].F=u.S.S+1;
          s[0][h2.F].S=u.F;
        }
    }
    for(int i=0;i<=n;i++){
      if(s[0][i].F==-1)s[0][i].F=n;
      if(s[0][i].S==-1)s[0][i].S=n;
      //cout<<s[0][i].S<<" ";
    }//cout<<"\n";
    for(int i=1;i<=bts;i++){
      for(int j=0;j<=n;j++){
        s[i][j].F=s[i-1][s[i-1][j].F].F;
        s[i][j].S=s[i-1][s[i-1][j].S].S;
       // cout<<s[i][j].S<<" ";
      }//cout<<"\n";
    }
}
int minimum_jumps(int A, int B, int C, int D) {
    swap(B,C);
    //cout<<A<<" "<<B<<"\n";
    if(A<=p[B].F)return -1;
    //cout<<A<<" "<<B<<"\n";
    ll r=0;
    for(int i=bts;i>=0;i--){
      //cout<<"s["<<i<<"]["<<A<<"]="<<s[i][A].S<<"\n";
      if(d[s[i][A].F]>=d[B]){
          r+=(1LL<<i);
          A=s[i][A].F;
      }
     // cout<<i<<":"<<A<<" "<<B<<"\n";
    }
    for(int i=bts;i>=0;i--){
      if(d[s[i][A].S]>=d[B]){
          r+=(1LL<<i);
          A=s[i][A].S;
       //   cout<<A<<" "<<B<<"\n";
      }
    }
    return r;
}

• 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