Cod sursa(job #1755060)

Utilizator avramraresAvram Rares Stefan avramrares Data 9 septembrie 2016 12:30:05
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.99 kb
#include <fstream>

using namespace std;
int step,N,val,V[100000],i,t,j,type;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int main()
{
    f>>N;
    for(i=1; i<=N; i++)
        f>>V[i];
    f>>t;
    for (step = 1; step < N; step <<= 1);
    for(j=1; j<=t; j++)
    {
        f>>type>>val;
        if(type==0)
        {
            for (i = 0; step; step=step/2)
                if (i + step <= N && V[i + step] <= val)
                    i += step;
            if(V[i]==val)
            g<<i<<'\n';
            else g<<-1<<'\n';
        }
        else if(type==1)
        {
            for (i = 0; step; step >>= 1)
                if (i + step <= N && V[i + step] <= val)
                    i += step;
            g<<i<<'\n';
        }
        else if(type==2)
        {
            for (i = 0; step; step >>= 1)
                if (i + step <= N && V[i + step] >=val)
                    i += step;
            g<<i<<'\n';
        }
    }
    return 0;
}