Cod sursa(job #1394592)

Utilizator alexburdescuBurdescu Alexandru alexburdescu Data 20 martie 2015 14:28:53
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.69 kb
#include<fstream>
using namespace std;
int n,m,a[100009],i,intrebare,valoare,p1,p2,mij;
int main ()
{
    ifstream fin("cautbin.in");
    ofstream fout("cautbin.out");
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>a[i];
    }
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>intrebare>>valoare;
        if(intrebare==0)
        {
            p1=1;
            p2=n;
            while(p1<=p2)
            {
                mij=(p1+p2)/2;
                if(a[mij]<=valoare)
                {
                    p1=mij+1;
                }
                else
                {
                    p2=mij-1;
                }
            }
            if(a[p2]==valoare)
            {
                fout<<p2<<"\n";
            }
            else
            {
                fout<<"-1"<<"\n";
            }
        }
        if(intrebare==1)
        {
            p1=1;
            p2=n;
            while(p1<=p2)
            {
                mij=(p1+p2)/2;
                if(a[mij]<=valoare)
                {
                    p1=mij+1;
                }
                else
                {
                    p2=mij-1;
                }
            }
            fout<<p2<<"\n";
        }
        if(intrebare==2)
        {
            p1=1;
            p2=n;
            while(p1<=p2)
            {
                mij=(p1+p2)/2;
                if(a[mij]<valoare)
                {
                    p1=mij+1;
                }
                else
                {
                    p2=mij-1;
                }
            }
            fout<<p1<<"\n";
        }
    }
    fin.close();
    fout.close();
    return 0;
}