Cod sursa(job #2046460)

Utilizator BirouRaresBirou Rares Gabriel BirouRares Data 23 octombrie 2017 20:21:01
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 2.43 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,m,i,x,v[100002],c,r,l,ok;
void citire()
{
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>v[i];
    }
    f>>m;
}
int main()
{
    citire();
    l=1;
    r=n;
    ok=0;
    for(int k=1;k<=m;k++)
    {
        f>>c>>x;
        if(c==0)
        {
            int mij;
            while(l<=r&&ok==0)
            {
                mij=l+(r-l)/2;
                if(v[mij]==x)
                {
                    if(mij==r||v[mij+1]>x)
                    {
                       g<<mij<<"\n";
                       ok=1;
                    }
                    else
                    {
                        l=mij+1;
                    }
                }
                else
                {
                    if(v[mij]>x)
                    r=mij-1;
                    else
                    l=mij+1;
                }
            }
            if(ok==0)
            g<<-1<<"\n";
        }
        ok=0;
        l=1;
        r=n;
        if(c==1)
        {
            int mij;
            while(l<=r&ok==0)
            {
                mij=l+(r-l)/2;
                if(v[mij]<=x)
                {
                    if(mij==l||v[mij+1]>x)
                    {
                        ok=1;
                        g<<mij<<"\n";
                    }
                    else
                    {
                        l=mij+1;
                    }
                }
            else
            r=mij-1;
            }
            if(ok==0)
            g<<mij<<"\n";
        }
        ok=0;
        l=1;
        r=n;
        if(c==2)
        {
            int mij;
            while(l<=r&&ok==0)
            {
                mij=l+(r-l)/2;
                if(v[mij]==x)
                {
                    if(mij==l||v[mij-1]<x)
                    {
                        ok=1;
                        g<<mij;
                    }
                    else
                    {
                        r=mij-1;
                    }
                }
                else
                {
                    if(v[mij]>x)
                        r=mij-1;
                    else
                        l=mij+1;
                }
            }
            if(ok==0)
            g<<mij;
        }
    }
    return 0;
}