Cod sursa(job #1146586)

Utilizator roxana_97Soare Roxana Florentina roxana_97 Data 19 martie 2014 09:26:31
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.23 kb
#include<fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,v[100009],x,tip,l,st,m,mij;

int cautare(int x)
{
    st=1;int dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x) return mij;
        else if(v[mij]<x) st=mij+1;
             else dr=mij-1;
    }
    return 0;
}

int main()
{
    f>>n;
    for(int i=1;i<=n;++i) f>>v[i];
    f>>m;
    for(int i=1;i<=m;++i)
    {
        f>>tip>>x;
        if(tip==0)
        {
           cautare(x);
           if(mij>0)
           {
               l=1;
               while(v[mij]==v[mij+l]) l++;
               g<<mij+l-1<<'\n';
           }
            else g<<-1<<'\n';
        }
        if(tip==1)
        {
            cautare(x);
            if(mij>0)
            {
               l=1;
               while(v[mij]==v[mij+l]) l++;
               g<<mij+l-1<<'\n';
            }
                else g<<st<<'\n';
        }
        if(tip==2)
        {
            if(mij>0)
            {
               l=1;
               while(v[mij]==v[mij-l]) l++;
               g<<mij-l+1<<'\n';
            }
            else g<<st<<'\n';
        }
    }
    f.close();g.close();
    return 0;
}