Cod sursa(job #2249387)

Utilizator alex2209alexPavel Alexandru alex2209alex Data 29 septembrie 2018 18:50:01
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.6 kb
#include <fstream>

using namespace std;
int v[100005];
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,m,a,b,x,st,dr,mij,i;
int main()
{

    f>>n;
    x=-1;
    for(i=1; i<=n; i++)
    {
        f>>v[i];
    }
    f>>m;
    for(i=0; i<m; i++)
    {
        f>>b>>a;
        st=1;
        dr=n;
        if(b==0)
        {
            x=-1;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]==a)
                {
                    x=mij;
                    st=mij+1;
                }
                else if(v[mij]<a)
                {
                    st=mij+1;
                }
                else
                {
                    dr=mij-1;
                }
            }
            g<<x<<'\n';
        }
        else if(b==1)
        {
            x=-1;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]<=a)
                {
                    x=mij;
                    st=mij+1;
                }
                else
                {
                    dr=mij-1;
                }
            }
            g<<x<<'\n';
        }
        else
        {
            x=-1;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]>=a)
                {
                    x=mij;
                    dr=mij-1;
                }
                else
                {
                    st=mij+1;
                }
            }
            g<<x<<'\n';
        }
    }
    return 0;
}