Cod sursa(job #1769938)

Utilizator NinjaCubeMihai Radovici NinjaCube Data 3 octombrie 2016 13:37:06
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.34 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int v[100001],n,i,st,dr,m,a,x,mij;
int cautare0 ( int x)
{
    int poz=-1;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<x)
            st=mij+1;
        else
            if(v[mij]>x)
                dr=mij-1;
            else
            {
                st=mij+1;
                poz=mij;
            }
    }
    return poz;
}
int cautare1(int x)
{
    int poz;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
        {
            st=mij+1;
            poz=mij;
        }
        else
            if(v[mij]>x)
                dr=mij-1;
    }
    return poz;
}
int cautare2(int x)
{
    int poz;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<x)
            st=mij+1;
        else
            if(v[mij]>=x)
            {
                dr=mij-1;
                poz=mij;
            }

    }
    return poz;
}
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>a>>x;
        dr=n,st=1;
        if(a==0)
            fout<<cautare0(x)<<"\n";
        if(a==1)
            fout<<cautare1(x)<<"\n";
        if(a==2)
            fout<<cautare2(x)<<"\n";
    }
    return 0;
}