Cod sursa(job #1770280)

Utilizator qThunderStefan Durlanescu qThunder Data 3 octombrie 2016 23:06:30
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.89 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int m,n,i,j,dr,st,mij,a[100002],k,k1,k2,mix;
int main()
{

    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>a[i];
    }
    fin>>m;
    for(i=1;i<=m;i++)
    {
            fin>>k1>>k2;
            st=1;
            dr=n;
            k=0;
            if(k1==0)
            {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(a[mij]==k2)
                {
                    if(k<mij)
                        k=mij;
                        st=mij+1;
                }
                else
                {
                    if(a[mij]<k2)
                    {
                        st=mij+1;
                    }
                    else
                        dr=mij-1;
                }
            }
            if(k!=0)
                fout<<k<<"\n";
            else
                fout<<-1;
            }
            if(k1==1)
            {   k=0;
                while(st<=dr)
                {
                    mij=(st+dr)/2;
                    if(a[mij]<=k2)
                    {
                        if(k<mij)
                            k=mij;
                            st=mij+1;
                    }
                    else
                        dr=mij-1;
            }
            fout<<k<<"\n";
            }
            if(k1==2)
            {
                k=1000000000;
                while(st<=dr)
                {
                    mij=(st+dr)/2;
                    if(a[mij]>=k2)
                    {
                        if(k>mij)
                            k=mij;
                            dr=mij-1;
                    }
                    else
                        st=mij+1;
            }
            fout<<k;
            }
    }
    return 0;
}