Cod sursa(job #2567657)

Utilizator Artur26Seres Artur Artur26 Data 3 martie 2020 18:16:31
Problema Cautare binara Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 2.05 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,m,v[100001],y,x;
int cautare_binara()
{
    int lo=0,hi=n+1,mij;
    while(hi-lo>1)
    {
        mij=(lo+hi)/2;
        if(v[mij]>x)
            hi=mij;
        else
            lo=mij;
    }
    if(lo<n+1&&v[lo]==x)
        return lo;
    else
        return -1;
}
int cautare_binara2()
{
    int lo=0,hi=n+1,mij;
    while(hi-lo>1)
    {
        mij=(lo+hi)/2;
        if(v[mij]<x)
            lo=mij;
        else
            hi=mij;
    }
    if(hi<n+1&&v[hi]==x)
        return hi;
    else
        return -1;
}
int main()
{
    int i,ok,ok2,k;
    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    f>>m;
    while(m>0)
    {
        f>>y;
        f>>x;
        if(y==0)
        {
            k=cautare_binara();
            g<<k<<'\n';
        }
        if(y==1)
        {
            ok=0;
            k=cautare_binara();
            if(k==-1)
            {
                while(ok!=1)
                {
                    x--;
                    k=cautare_binara();
                    if(k!=-1)
                    {
                        g<<k<<'\n';
                        ok=1;
                    }
                }
            }
            else
            {
                    g<<k<<'\n';
            }
        }
        if(y==2)
        {
                ok2=0;
                k=cautare_binara();
                if(k==-1)
                {
                    while(ok2!=1)
                    {
                        x++;
                        k=cautare_binara2();
                        if(k!=-1)
                        {
                            g<<k<<'\n';
                            ok2=1;
                        }
                    }
                }
                else
                {
                    k=cautare_binara2();
                    g<<k<<'\n';
                }
        }
        m--;
    }

    return 0;
}