Submission #1047560

#	Time	Username	Problem	Language	Result	Execution time	Memory
1047560		Marco_Escandon	Rainforest Jumps (APIO21_jumps)	C++11	33 / 100	4066 ms	85796 KiB

jumps

#include "jumps.h"

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n;
vector<vector<ll>>PD,PI;
void init(int N, std::vector<int> h)
{
    n=N; stack<ll> q;
    PD.assign(24,vector<ll>(n+6,n+5));
    PI.assign(24,vector<ll>(n+6,-1));
    for(int i=0; i<n; i++)
    {
        while(!q.empty()&&h[i]>h[q.top()])
        {
            PD[0][q.top()]=i;
            q.pop();
        }
        if(!q.empty()) PI[0][i]=q.top();
        q.push(i);
    }
    for(int i=1; i<24; i++)
        for(int j=0; j<n+6; j++)
            PD[i][j]=PD[i-1][PD[i-1][j]];
}
vector<ll> cache;
ll asd,asd2;
ll asdf;
ll sol(ll node)
{
    if(node>asd2||node<0) return 1e9;
    if(node>=asd) return 0;
    if(cache[node]!=-1) return cache[node];
    ll o1=(asdf>PI[0][node])+sol(PI[0][node]),o2=1+sol(PD[0][node]);
    return cache[node]=min(o1,o2);
}
int minimum_jumps(int A, int B, int C, int D)
{
    cache.assign(n+6,-1);
    asd=C;
    asd2=D;
    asdf=A;
    ll bs=sol(B);
    if(bs>=1e9) bs=-1;
    return bs;
}

• 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