Cod sursa(job #1840191)

Utilizator IsacLucianIsac Lucian IsacLucian Data 3 ianuarie 2017 21:29:37
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.38 kb
#include <bits/stdc++.h>
#define nmax 100000
using namespace std;

ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int a[nmax],n,m;
int main()
{
    int st,dr,mij,i,x,y,poz=0;
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>a[i];
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>y>>x;
        if(y==0)
        {
            st=1;dr=n;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(a[mij]==x){poz=mij;st=mij+1;}
                    else
                        if(a[mij]>x)dr=mij-1;
                    else
                        st=mij+1;
            }
            if(poz==0)
                fout<<"-1"<<"\n";
            else
            fout<<poz<<"\n";
        }


        if(y==1)
        {
            st=1;dr=n;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(a[mij]<=x){poz=mij;st=mij+1;}
                    else
                        dr=mij-1;
            }
            fout<<poz<<"\n";
        }

        if(y==2)
        {
            st=1;dr=n;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(a[mij]>=x){poz=mij;dr=mij-1;}
                    else
                        st=mij+1;
            }
            fout<<poz<<"\n";
        }
    }
    fin.close();
    fout.close();
    return 0;
}