Cod sursa(job #2059091)

Utilizator Tudor2PopescuPopescu Tudor-Cristian Tudor2Popescu Data 6 noiembrie 2017 17:26:24
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.58 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream  fin("cautbin.in");
ofstream fout("cautbin.out");
int c,p,l,r,v[100004],x,n,m,i;
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>v[i];
    }
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>c>>x;
        if(c==0)
        {
            l=1;
            r=n;
            while(l<=r)
            {
                p=(l+r)/2;
                if(v[p]<=x)
                {
                    l=p+1;
                }
                else
                {
                    r=p-1;
                }
            }
            if(v[r]==x)
            {
                fout<<r;
            }
            else
            {
                fout<<-1;
            }
        }
        if(c==1)
        {
            l=1;
            r=n;
            while(l<=r)
            {
                p=(l+r)/2;
                if(v[p]<=x)
                {
                    l=p+1;
                }
                else
                {
                    r=p-1;
                }
            }
            fout<<r;
        }
        if(c==2)
        {
            l=1;
            r=n;
            while(l<=r)
            {
                p=(l+r)/2;
                if(v[p]>=x)
                {
                    r=p-1;
                }
                else
                {
                    l=p+1;
                }
            }
            fout<<l;
        }
        fout<<"\n";
    }
    fin.close();
    fout.close();
    return 0;
}