Cod sursa(job #1892927)

Utilizator adinuticaCenuse Andrada Adina adinutica Data 25 februarie 2017 13:20:02
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.66 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,i,m,v[100002],x,w[100002],p1,p2,k,q;
int main()
{
    for(i=1;i<=n;i++)
    {
        fin>>v[i];
    }
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>w[i]>>x;
        if(w[i]==1)
        {
            p1=1;
            p2=n;
            k=-1;
            while(p1<=p2)
            {
                q=p1+(p2-p1)/2;
                if(x>=v[q])
                {
                    p1=q+1;;
                }
                else
                {
                    p2=q-1;
                }
            }
            if(v[p2]==x)
            {
                fout<<p2<<"\n";
            }
            else
            {
                fout<<"-1"<<"\n";
            }
        }
        if(w[i]==2)
        {
            p1=1;
            p2=n;
            k=-1;
            while(p1<=p2)
            {
                q=p1+(p2-p1)/2;
                if(x>=v[q])
                {
                    p1=q+1;;
                }
                else
                {
                    p2=q-1;
                }
            }
            fout<<p2<<"\n";
        }
        if(w[i]==3)
        {
            p1=1;
            p2=n;
            k=-1;
            while(p1<=p2)
            {
                q=p1+(p2-p1)/2;
                if(x>v[q])
                {
                    p1=q+1;;
                }
                else
                {
                    p2=q-1;
                }
            }
            fout<<p2<<"\n";
        }
    }
    fin.close();
    fout.close();
    return 0;
}