Cod sursa(job #1807479)

Utilizator catalin1200Coman Catalin catalin1200 Data 16 noiembrie 2016 17:31:17
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.26 kb
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int v[100005],n,mij,st,dr,i,j,k,ok,x,c,poz;
int caut0()
{
    st=1;
    dr=n;
   poz=-1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            poz=mij;
            st=mij+1;
        }
        else
            if(v[mij]<x)
                st=mij+1;
            else
                dr=mij-1;

    }
    return poz;
}
int caut1(){
    st=1;
    dr=n;
    poz=-1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
        {
            poz=mij;
            st=mij+1;
        }
        else
        {
            dr=mij-1;
        }
    }
    return poz;
}
int caut2()
{
    st=1;
    dr=n;
    poz=-1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]>=x)
            poz=mij,dr=mij-1;
        else
            st=mij+1;
    }
    return poz;
}


int main()

{

    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    f>>k;
    for(i=1;i<=k;i++)
    {
        f>>c>>x;
       switch(c)
       {
       case 0: g<<caut0()<<'\n' ;break;
       case 1: g<<caut1()<<'\n' ;break;
       case 2: g<<caut2()<<'\n' ;break;
       }
    }
    return 0;
}