Cod sursa(job #1343653)

Utilizator andrew_assassin789Andrei Manea andrew_assassin789 Data 15 februarie 2015 18:56:19
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.38 kb
#include <fstream>
using namespace std;
short v[100005];
short *ctb(short *st,short *dr, short x)
{
    if (dr-st<=1) return st;
    int m=(dr-st)/2;
    if (*(st+m)==x) return st+m;
    if (*(st+m)<x) return ctb(st+m,dr,x);
    return ctb(st,st+m,x);
}
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    int n,i,ii,m,t,x;
    short *p;
    f>>n;
    for (i=1;i<=n;i++)
        f>>v[i];
    f>>m;
    for (ii=1;ii<=m;ii++)
    {
        f>>t>>x;
        if (t==0)
        {
            p=ctb(v+1,v+n,x);
            if (*p==x)
            {
                while ((*p)==x) p++;
                g<<p-v-1<<'\n';

            }
            else g<<"-1\n";
        }
        else
            if (t==1)
            {
                p=ctb(v+1,v+n,x);
                if ((*p)==x)
                {
                    while ((*p)<=x) p++;
                    g<<p-v-1<<'\n';
                }
                else g<<p-v<<'\n';
            }
            else
                if (t==2)
                {
                    p=ctb(v+1,v+n,x);
                    if ((*p)==x)
                    {
                        while ((*p)>=x) p--;
                        g<<p-v+1<<'\n';
                    }
                    else g<<p-v+1<<'\n';
                }
    }
    delete p;
    f.close();
    g.close();
    return 0;
}