Cod sursa(job #1301895)

Utilizator bence21Bako Bence bence21 Data 26 decembrie 2014 14:34:28
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.7 kb
#include<fstream>
using namespace std;
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    long n,m,t[100001],i,x,a,b,k;
    int p;
    bool jo;
    f>>n;
    for(i=1;i<=n;i++)
        f>>t[i];
    f>>m;
    for(i=1;i<=m;i++)
    {
        f>>p>>x;
        if(p==0)
        {
            jo=0;
            a=1;
            b=n;
            k=(a+b)/2;
            while(a<=b)
            {
                if(t[k]>x)
                {
                    b=k-1;
                    k=(a+b)/2;
                }
                else
                {
                    a=k+1;
                    k=(a+b)/2;
                }
            }
            if(t[k]==x)
                g<<k<<"\n";
            else g<<"-1\n";
        }
        else if(p==1)
        {
            jo=0;
            a=1;
            b=n;
            k=(a+b)/2;
            while(a<=b)
            {
                if(t[k]>x)
                {
                    b=k-1;
                    k=(a+b)/2;
                }
                else
                {
                    a=k+1;
                    k=(a+b)/2;
                }
            }
            g<<k<<"\n";
        }
        else {
            jo=0;
            a=1;
            b=n;
            k=(a+b)/2;
            while(a<=b)
            {
                if(t[k]>=x)
                {
                    b=k-1;
                    k=(a+b)/2;
                }
                else
                {
                    a=k+1;
                    k=(a+b)/2;
                }
            }
            g<<k+1<<"\n";
        }
    }
    f.close();
    g.close();
    return 0;
}