Cod sursa(job #1836737)

Utilizator GeoeyMexicanuBadita George GeoeyMexicanu Data 28 decembrie 2016 16:52:56
Problema Cautare binara Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 1.49 kb
#include <iostream>
#include <fstream>

using namespace std;

ifstream f("cautbin.in");
ofstream g("cautbin.out");

int i,j,s,d,n,k,t,p,r;
int* v;

int bin1(int s,int d,int* v,int x)
{
    int m,t=-1;
    while(s<d)
    {
        m=(s+d)/2;
        if(v[m]==x && m>t)
        t=m;
        if(v[m]>x)
        {
            d=m;
        }
        else
            if(v[m]<=x)
            {
                s=m+1;
            }
    }
    return t;
}
int bin2(int s,int d,int* v,int x)
{
    int m,t=-1;
    while(s<d)
    {
        m=(s+d)/2;
        if(v[m]<=x && m>t)
            t=m;
        if(v[m]>x)
        {
            d=m;
        }
        else
            if(v[m]<=x)
            {
                s=m+1;
            }
    }
    return t;
}
int bin3(int s,int d,int* v,int x)
{
    int m,t;
    t=d;
    while(s<d)
    {
        m=(s+d)/2;
        if(v[m]>=x && m<t)
            t=m;
        if(v[m]>=x)
            d=m;
        else
            s=m+1;
    }
    return t;
}
int main()
{
    f>>n;
    v=new int[n+4];
    for(i=1;i<=n;i++)
        f>>v[i];
    f>>r;
    while(r!=0)
    {
        f>>i>>j;
        if(i==0)
        {
            g<<bin1(1,n,v,j)<<endl;
        }
        else
            if(i==1)
            {
                g<<bin2(1,n,v,j)<<endl;
            }
            else
                if(i==2)
                {
                    g<<bin3(1,n,v,j)<<endl;
                }
         r--;
    }
}