Cod sursa(job #1535033)

Utilizator PogonetPogonet Artiom Pogonet Data 24 noiembrie 2015 11:29:54
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.36 kb
#include<fstream>
using namespace std;
#define vmax 100001
int v[vmax],n,a,b,nr;
int cautbin(int x)
{
    int st = 0, dr = n-1,mij;
    while (st <= dr)
    {
        mij = (st + dr)/2;
        if (v[mij] <= x)  st = mij + 1;
        else              dr = mij - 1;
    }
    mij = (st + dr) / 2;
    if (v[mij] > x) mij--;
    if (v[mij] == x) {
        return mij + 1;
    }
    return -1;
}
int cautbin1(int x)
{
    int st = 0, dr = n-1,mij;
    while (st < dr)
    {
        mij = (st + dr) / 2;
        if (v[mij] <= x) st = mij + 1;
        else             dr = mij;
    }
    mij = (st+dr)/2;
    if (v[mij] > x) mij--;
    return mij+1;
}
int cautbin2(int x)
{
     int st = 0 , dr = n-1, mij;
     while (st < dr)
        {
            mij = (st + dr) / 2;
            if (v[mij] < x)  st = mij + 1;
            else              dr = mij;
        }
     mij = (st+dr)/2;
     if (v[mij] < x) mij++;
     return mij+1;
}
int main ()
{
    ifstream f ("cautbin.in");
    ofstream g ("cautbin.out");
    f >> n;
    for (int i = 0; i <= n-1; ++i)
        f >> v[i];
    f >> nr;
    for (int i = 1; i <= nr; ++i)
    {
        f >> a >> b;
        if (a == 0) g << cautbin(b);
        else
            if (a == 1) g << cautbin1(b);
            else
                g << cautbin2(b);
    }
    g.close ();
    return 0;
}