Cod sursa(job #860662)

Utilizator Coco.AndradaCordescu Andrada Coco.Andrada Data 20 ianuarie 2013 16:13:13
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.16 kb
#include<fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,m,v[100001],k,x,m,st,dr;
int main()
{
    f>>n;
    for (int i=1; i<=n; i++)
        f>>v[i];
    f>>m;
    for (int j=1; j<=m; j++)
    {
        f>>k>>x;
        st=0;
        dr=n+1;
        if (k==0)
        {
            while (st+1<dr)
            {
                m=(st+dr)/2;
                if(x<v[m])
                    dr=m;
                else
                    st=m;
            }
            if (v[st]==x)
                g<<st<<"\n";
            else
                g<<"-1"<<"\n";
        }
        if (k==1)
        {
            while (st+1<dr)
            {
                m=(st+dr)/2;
                if(x>=v[m])
                    st=m;
                else
                    dr=m;
            }
            g<<st<<"\n";
        }
        if (k==2)
        {
            while (st+1<dr)
            {
                m=(st+dr)/2;
                if(x<=v[m])
                    dr=m;
                else
                    st=m;
            }
            g<<dr<<"\n";
        }
    }
    return 0;
}