Cod sursa(job #1680374)

Utilizator andrew_assassin789Andrei Manea andrew_assassin789 Data 8 aprilie 2016 18:07:29
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.1 kb
#include <fstream>
#define nmax 100010
using namespace std;
unsigned int n;
unsigned int v[nmax];
int binss(unsigned int val)
{
    int i,step;
    for (step=1;step<=n;step<<=1);
    for (i=1;step;step>>=1)
    {
        if (i+step<=n && v[i+step]<=val)
            i+=step;
    }
    return i;
}
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    unsigned int m,i,op,x;
    int poz;
    f>>n;
    for (i=1;i<=n;i++)
        f>>v[i];
    for (f>>m;m;m--)
    {
        f>>op>>x;
        poz=binss(x);
        if (v[poz]!=x)
        {
            if (op==0) g<<"-1\n";
            else
            {
                if (op==1) g<<poz<<'\n';
                else
                {
                    while (v[poz]<=x) poz++;
                    g<<poz<<'\n';
                }
            }
        }
        else
        {
            if (op==2)
            {
                while (v[poz]>=x) poz--;
                g<<poz+1<<'\n';
            }
            else g<<poz<<'\n';
        }

    }
    f.close();
    g.close();
    return 0;
}