Cod sursa(job #932297)

Utilizator ralucik_2006Filimon Raluca Elena ralucik_2006 Data 28 martie 2013 20:18:30
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.18 kb
#include <fstream>

using namespace std;
int n,t,op,x,a[1000000],i;
int mai_mic(int x)
{
    int st=1,dr=n,pz=0,mij;
    while (st<=dr)
    {
        mij=(st+dr)/2;
        if (a[mij]<=x)
        {
            pz=mij;
            st=mij+1;
        }
        else dr=mij-1;
    }
    return pz;
}
int mai_mare(int x)
{
    int st=1,dr=n,pz=0,mij;
    while (st<=dr)
    {
        mij=(st+dr)/2;
        if (a[mij]<x)
            st=mij+1;
        else
        {
            pz=mij;
            dr=mij-1;
        }
    }
    return pz;
}
int egal(int x)
{
    int st=1,dr=n,pz=0,mij;
    while (st<=dr)
    {
        mij=(st+dr)/2;
        if (a[mij]==x)
        {
            st=mij+1;
            pz=mij;
        }
        else
            if (a[mij]<x) st=mij+1;
            else dr=mij-1;
    }
    return pz;
}
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    f>>n;
    for (i=1;i<=n;i++)
      f>>a[i];
    f>>t;
    while (t--)
    {
        f>>op>>x;
        if (op==0) g<<egal(x)<<'\n';
        else if (op==1) g<<mai_mic(x)<<'\n';
              else if (op==2) g<<mai_mare(x)<<'\n';
    }
    return 0;
}