Cod sursa(job #1366271)

Utilizator dragosmdvMoldovan Dragos dragosmdv Data 28 februarie 2015 21:44:24
Problema Cautare binara Scor 80
Compilator cpp Status done
Runda Arhiva educationala Marime 1.99 kb
#include <fstream>

using namespace std;

ifstream fin("cautbin.in");
ofstream fout("cautbin.out");

int x, n, i, M, ls, ld, mij, poz,l,nr, v[100050];

int main()
{
    fin>>n;
    for(i=1; i<=n; i++)
    {
        fin>>v[i];
    }
    fin>>M;
    for(l=1; l<=M; l++)
    {
        fin>>x;
        if(x==0)
        {
            fin>>nr;
            ls=1;
            poz=-1;
            ld=n;
            while(ls<=ld and poz==-1)
            {
                mij=(ls+ld)/2;
                if(nr==v[mij] and v[mij+1]!=nr)
                    poz=mij;


                else if(nr<v[mij])
                    ld=mij-1;
                else if(nr>v[mij])
                    ls=mij+1;
                else if(nr==v[mij])
                    ls=mij+1;
            }
            fout<<poz<<'\n';
        }

        else if(x==1)
        {
            fin>>nr;
            ls=1;
            poz=-1;
            ld=n;
            while(ls<=ld and poz==-1)
            {
                mij=(ls+ld)/2;
                if(nr>=v[mij] and v[mij+1]>nr)
                    poz=mij;


                else if(nr<v[mij])
                    ld=mij-1;
                else if(nr>v[mij])
                    ls=mij+1;
                else if(nr==v[mij])
                    ls=mij+1;
            }if (poz==-1)
            poz=n;
            fout<<poz<<'\n';
        }

        else if(x==2)
        {
            fin>>nr;
            ls=1;
            poz=-1;
            ld=n;
            while(ls<=ld and poz==-1)
            {
                mij=(ls+ld)/2;
                if(nr<=v[mij] and v[mij-1]<nr)
                    poz=mij;


                else if(nr<v[mij])
                    ld=mij-1;
                else if(nr>v[mij])
                    ls=mij+1;
                else if(nr==v[mij])
                    ld=mij+1;
            }
            if (poz==-1)
            poz=n;
            fout<<poz<<'\n';
        }

    }


    return 0;
}