Cod sursa(job #1480154)

Utilizator tudorgalatanRoman Tudor tudorgalatan Data 2 septembrie 2015 10:08:09
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.24 kb
// Galatan Tudor - Ion Luca High School
// Vatra Dornei, September 2, 2015
#include <fstream>

using namespace std;

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

int x[100010];
int n, i, m, a, b, psn;

int bin_src_1 (int val)
{
    int lt = 1, p, med, last = -1;
    p = n;
    while (lt <= p)
    {
        med = (lt+p)/2;
        if (val >= x[med])
        {
            last = med;
            lt = med+1;
        }
        else
            p = med-1;
    }
    return last;
}

int bin_src_2 (int val)
{

    int lt = 1, p, med, last = -1;
    p = n;
    while (lt <= p)
    {
        med = (lt+p)/2;
        if (val <= x[med])
        {
            last = med;
            p = med-1;
        }
        else
            lt = med+1;
    }
    return last;
}

int main()
{
    in >> n;
    for (i=1; i<=n; i++)
        in >> x[i];
    in >> m;
    for (i=1; i<=m; i++)
    {
        in >> a >> b;
        psn = bin_src_1 (b);
        if (a == 0) if (x[poz] == b)
                out << psn << "\n";
            else
                out << -1 << "\n";
        else if(a == 1)
            out << psn << "\n";
        else
            out << bin_src_2 (b) << "\n";
    }
    return 0;
}