Submission #657668

#	Time	Username	Problem	Language	Result	Execution time	Memory
657668		activedeltorre	Rainforest Jumps (APIO21_jumps)	C++14	33 / 100	4030 ms	14460 KiB

jumps

#include "jumps.h"

#include <iostream>
#include <vector>
#include <stack>
#include <queue>
using namespace std;
stack <int>st;
int v[200005];
vector<int>adj[200005];
int n;
void init(int N, vector<int> H)
{
    int i;
    n=N;
    for(i=1; i<=n; i++)
    {
        v[i]=H[i-1];
    }
    v[0]=1e8;
    st.push(0);
    for(i=1; i<=n; i++)
    {
        while(v[i]>v[st.top()])
        {
            adj[st.top()].push_back(i);
            st.pop();
        }
        st.push(i);
    }
    while(st.size())
    {
        st.pop();
    }
    st.push(n+1);
    v[n+1]=1e8;
    for(i=n; i>=1; i--)
    {
        while(v[i]>v[st.top()])
        {
            adj[st.top()].push_back(i);
            st.pop();
        }
        st.push(i);
    }
    while(st.size())
    {
        st.pop();
    }
}
queue<int>qu;
int rasp[200005];
int minimum_jumps(int a, int b, int c, int d)
{
    int i,k,curr;
    a++;
    b++;
    c++;
    d++;
    for(i=1;i<=n;i++)
    {
        rasp[i]=1e8;
    }
    if(a>b)
    {
        swap(a,b);
    }
    if(c>d)
    {
        swap(c,d);
    }
    for(i=a;i<=b;i++)
    {
        qu.push(i);
        rasp[i]=0;
    }
    while(qu.size())
    {
        curr=qu.front();
        qu.pop();
        if(curr>=c && curr<=d)
        {
            while(qu.size())
            {
                qu.pop();
            }
            return rasp[curr];
        }
        for(i=0;i<adj[curr].size();i++)
        {
            k=adj[curr][i];
            if(rasp[k]>rasp[curr]+1)
            {
                rasp[k]=rasp[curr]+1;
                qu.push(k);
            }
        }
    }
    return -1;
}
vector<int>vect;
/*int main ()
{
    int ne,i,q,a,b,c,d,x;
    cin>>ne;
    for(i=1;i<=ne;i++)
    {
        cin>>x;
        vect.push_back(x);
    }
    init(ne,vect);
    cin>>q;
    for(i=1;i<=q;i++)
    {
        cin>>a>>b>>c>>d;
        cout<<minimum_jumps(a,b,c,d);
    }
}
*/

Compilation message (stderr)

jumps.cpp: In function 'int minimum_jumps(int, int, int, int)':
jumps.cpp:89:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |         for(i=0;i<adj[curr].size();i++)
      |                 ~^~~~~~~~~~~~~~~~~

• 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