Submission #657698

#	Time	Username	Problem	Language	Result	Execution time	Memory
657698		activedeltorre	Rainforest Jumps (APIO21_jumps)	C++14	4 / 100	890 ms	10716 KiB

jumps

#include "jumps.h"

#include <iostream>
#include <vector>
#include <stack>
#include <queue>
using namespace std;
stack <int>st;
int v[200005];
int dpst[200005];
int dpdr[200005];
int nextst[200005];
int nextdr[200005];
int aint[3][800005];
int n;
int querry(int node,int st,int dr,int qst,int qdr,int tip)
{
    if(st>qdr || qst>dr)
    {
        return 10000000;
    }
    else if(qst<=st && dr<=qdr)
    {
        return aint[tip][node];
    }
    else
    {
        int mij=(st+dr)/2,val1,val2;
        val1=querry(node*2,st,mij,qst,qdr,tip);
        val2=querry(node*2+1,mij+1,dr,qst,qdr,tip);
        return min(val1,val2);
    }
}
void build(int node,int st,int dr)
{
    if(st==dr)
    {
        aint[0][node]=dpst[st];
        aint[1][node]=dpdr[st];
        return;
    }
    else if(st!=dr)
    {
        int mij=(st+dr)/2;
        build(node*2,st,mij);
        build(node*2+1,mij+1,dr);
        aint[0][node]=min(aint[0][node*2],aint[0][node*2+1]);
        aint[1][node]=min(aint[1][node*2],aint[1][node*2+1]);
        return;
    }
}
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);
    dpst[0]=0;
    for(i=1; i<=n; i++)
    {
        while(v[i]>v[st.top()])
        {
            st.pop();
        }
        nextst[i]=st.top();
        dpst[i]=dpst[st.top()]+1;
        st.push(i);
    }
    while(st.size())
    {
        st.pop();
    }
    st.push(n+1);
    v[n+1]=1e8;
    dpdr[n+1]=0;
    for(i=n; i>=1; i--)
    {
        while(v[i]>v[st.top()])
        {
            st.pop();
        }
        nextdr[i]=st.top();
        dpdr[i]=dpdr[st.top()]+1;
        st.push(i);
    }
    build(1,1,n);
}
int minimum_jumps(int a, int b, int c, int d)
{
    int i,k,curr;
    a++;
    b++;
    c++;
    d++;
    if(a>b)
    {
        swap(a,b);
    }
    if(a<=c && b>=c)
    {
        return 0;
    }
    if(c<a)
    {
        if(nextdr[c]>a)
        {
            b=min(b,nextdr[c]-1);
            return querry(1,1,n,a,b,0)-dpst[c];
        }
        else
        {
            return -1;
        }
    }
    if(c>b)
    {
        if(nextst[c]<b)
        {
            a=max(a,nextst[c]+1);
            return querry(1,1,n,a,b,1)-dpdr[c];
        }
        else
        {
            return -1;
        }
    }
    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:94:9: warning: unused variable 'i' [-Wunused-variable]
   94 |     int i,k,curr;
      |         ^
jumps.cpp:94:11: warning: unused variable 'k' [-Wunused-variable]
   94 |     int i,k,curr;
      |           ^
jumps.cpp:94:13: warning: unused variable 'curr' [-Wunused-variable]
   94 |     int i,k,curr;
      |             ^~~~

• Subtask 1: 4 / 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