Cod sursa(job #2241663)

Utilizator Mmoro2006Mihnea Morosan Mmoro2006 Data 16 septembrie 2018 17:22:19
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.35 kb
#include <fstream>

using namespace std;
int v[100005];
ifstream cin("cautbin.in");
ofstream cout("cautbin.out");
int main()
{
    int n,m,a,b,x=-1,st,dr,mij;
    cin >> n;
    for(int i=1; i<=n; i++)
    {
        cin >> a;
        v[i]=a;
    }
    cin >> m;
    for(int i=0; i<m; i++)
    {
        cin >> 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;
          }
          cout << 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;
          }
          cout << 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;
          }
          cout << x << '\n';
        }
    }
    return 0;
}