Cod sursa(job #2163855)

Utilizator calinlixandruLixandru Calin-Mihai calinlixandru Data 12 martie 2018 20:14:41
Problema Secventa Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.61 kb
#include <iostream>
#include <fstream>
#include <deque>
using namespace std;
ifstream fin("secventa.in");
ofstream fout("secventa.out");
int i,x,y,v[500002],semn,j,p,u,maxi,n,m;
deque <int> q;
char s[5*500002];
int main()
{
    fin>>n>>m;
    fin.get();
    fin.get(s,500002);
    j=0;
    for(i=1; i<=n; i++) {
        semn=1;
        if(s[j]=='-') {
            semn=-1;
            j++;
        }
        while(s[j]>='0' && s[j]<='9') {
            v[i]=v[i]*10+s[j]-'0';
            j++;
        }
        v[i]*=semn;
        j++;
    }
    /*for(i=1;i<=n;++i)
    {
        while(!q.empty() && v[q.back()]>v[i])
        {
            q.pop_back();
        }
        q.push_back(i);
        while(q.front()==i-m)
        {
            q.pop_front();
        }
        if(maxi<v[q.front()] && i>=m)
        {
            maxi=v[q.front()];
            u=i;
            p=i-m+1;
        }
    }
    fout<<p<<" "<<u<<" "<<maxi<<'\n';*/
    for(i=1; i<=m; i++)
    {

        while(q.size()>=1&&v[q.front()]>=v[i])
        {
            q.pop_front();
        }

        q.push_front(i);
    }

    if(v[q.back()]>maxi)
    {
        maxi=v[q.back()];
        u=m;
        p=1;
    }


    for(i=m+1; i<=n; i++)
    {
        while(q.size()>=1&&q.back()<=i-m)q.pop_back();
        while(q.size()>=1&&v[q.front()]>=v[i])
        {
            q.pop_front();
        }
        q.push_front(i);

        if(v[q.back()]>maxi)
        {
            maxi=v[q.back()];
            u=i;
            p=i-m+1;
        }
    }

    fout<<p<<" "<<u<<" "<<maxi;
    return 0;
}