Submission #983644

#	Time	Username	Problem	Language	Result	Execution time	Memory
983644		Nexus	Rainforest Jumps (APIO21_jumps)	C++17	8 / 100	4058 ms	15292 KiB

jumps

#include <bits/stdc++.h>
#define ll long long

using namespace std;

const ll N=2e5+9,M=2e18+9,mod=1e9+7;

bool vis[N];
pair<ll,ll>p;
vector<ll>v[N];
ll a[N],n,x,y,z;
priority_queue<pair<ll,ll>>q;

void init(int m,vector<int>h)
{
    n=m;
    for(ll i=0;i<n;++i)a[i]=h[i];
    for(ll i=0;i<n;++i)
    {
        for(ll j=i-1;j>=0;--j)
        {
            if(a[j]>a[i])
            {
                v[i].push_back(j);
                break;
            }
        }
        for(ll j=i+1;j<n;++j)
        {
            if(a[j]>a[i])
            {
                v[i].push_back(j);
                break;
            }
        }

    }
}

int minimum_jumps(int A, int B, int C, int D)
{
    x=-1;
    vector<ll>d(n,M);
    for(ll i=A;i<=B;++i)
    {
        d[i]=0;
        q.push({0,i});
        while(q.size())
        {
            y=q.top().second;
            q.pop();
            if(C<=y && y<=D)
            {
                x=(x==-1?d[y]:min(x,d[y]));
                continue;
            }
            for(auto j:v[y])
            {
                if(d[j]>d[y]+1)
                {
                    d[j]=d[y]+1;
                    q.push({-d[j],j});
                }
            }
        }
    }
    return x;
}

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