Cod sursa(job #2364807)

Utilizator bostanlucastefanBostan Luca-Stefan bostanlucastefan Data 4 martie 2019 10:55:01
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.41 kb
#include <fstream>

using namespace std;

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

int n,m,st,dr,mij,v[100000],c,x,i,aux0,aux1,aux2;

int main()
{
    fin>>n;
    for(i=1; i<=n; i++)
        fin>>v[i];
    fin>>m;
    for(i=1; i<=m; i++)
    {
        fin>>c>>x;
        st=1;
        dr=n;
        aux0=aux1=aux2=-1;
        if(c==0)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]==x)
                {
                    aux0=mij;
                    st=mij+1;
                }
                else if(v[mij]>x)
                    dr=mij-1;
                else
                    st=mij+1;
            }
            fout<<aux0<<'\n';
        }
        else if(c==1)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if (v[mij]<=x)
                {
                    aux1=mij;
                    st=mij+1;
                }
                else dr=mij-1;
            }
            fout<<aux1<<'\n';
        }
        else
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if (v[mij]>=x)
                {
                    aux2=mij;
                    dr=mij-1;
                }
                else st=mij+1;
            }
            fout<<aux2<<'\n';
        }
    }
    return 0;
}