Cod sursa(job #1522407)

Utilizator gabor.vlad13lil pump gabor.vlad13 Data 11 noiembrie 2015 18:03:08
Problema Cautare binara Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 1.41 kb
#include <cstdio>

using namespace std;

int n, vec[105], l;
int st, dr, mij;

int Operatia_1(int nr, int st = 0, int dr = n-1)
{
    if (st > dr)
        return dr;

    mij = (st+dr)/2;

    if (vec[mij] > nr)
        return Operatia_1(nr, st, mij-1);
    else
        return Operatia_1(nr, mij+1, dr);

}

int Operatia_2(int nr, int st = 0, int dr = n-1)
{
    if (st > dr)
        return st;

    mij = (st+dr)/2;

    if (vec[mij] >= nr)
        return Operatia_2(nr, st, mij-1);
    else
        return Operatia_2(nr, mij+1, dr);

}

void Citeste(int i=0)
{
    if (i==n)
        return;
    scanf("%d ", &vec[i]);
    Citeste(i+1);

}

void Read()
{
    int elem, tip, nr, op;
    scanf("%d\n", &n);
    Citeste();
    scanf("\n");
    scanf("%d", &elem);
    for (int i=1; i<=elem; i++)
    {
        scanf("%d %d\n", &tip, &nr);
        if (tip==0)
        {
            op = Operatia_1(nr);
            if (vec[op]!=nr)
                printf("-1\n");
            else
                printf("%d\n", op+1);
        }

        else if (tip==1)
        {
            op = Operatia_1(nr);
            printf("%d\n", op+1);
        }

        else if (tip==2)
        {
            printf("%d\n", Operatia_2(nr)+1);
        }
    }
}
int main()
{
    freopen("cautbin.in", "r", stdin);
    freopen("cautbin.out", "w", stdout);
    Read();
    return 0;
}