Cod sursa(job #2575065)

Utilizator Artur26Seres Artur Artur26 Data 6 martie 2020 11:28:12
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.29 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int x,y,m,k,n,v[100001];
int cautare_binara1()
{
    int lo=0,hi=n+1,mij;
    while(hi-lo>1)
    {
        mij=(hi+lo)/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=(hi+lo)/2;
        if(v[mij]>x)
            hi=mij;
        else
            lo=mij;
    }
    return lo;
}
int cautare_binara3()
{
    int lo=0,hi=n+1,mij;
    while(hi-lo>1)
    {
        mij=(hi+lo)/2;
        if(v[mij]<x)
            lo=mij;
        else
            hi=mij;
    }
    return hi;
}
int main()
{
    int i;
    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_binara1();
           g<<k<<'\n';
        }
        if(y==1)
        {
            k=cautare_binara2();
            g<<k<<'\n';
        }
        if(y==2)
        {
            k=cautare_binara3();
            g<<k<<'\n';
        }
        m--;
    }

    return 0;
}