Cod sursa(job #2342325)

Utilizator vladrataRata Vlad Daniel vladrata Data 12 februarie 2019 18:59:00
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.35 kb
#include <fstream>

using namespace std;
int n,v[100002],m;

int cautbin0 (int x)
{
    int st,mij,dr,poz=-1;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            poz=mij;
            st=mij+1;
        }
        if(v[mij]>x)
            dr=mij-1;
        if(v[mij]<x)
            st=mij+1;
    }
    return poz;
}
int cautbin1(int x)
{

    int st,mij,dr,poz=-1;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
        {
            poz=mij;
            st=mij+1;
        }
        if(v[mij]>x)
            dr=mij-1;
    }
    return poz;
}
int cautbin2(int x)
{
    int st,mij,dr,poz=-1;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]>=x)
        {
            poz=mij;
            dr=mij-1;
        }
        if(v[mij<x])
            st=mij+1;
    }
    return poz;
}
int main()
{
    ifstream in("cautbin.in");
    ofstream out("cautbin.out");
    int i,a,poz;
    in>>n;
    for(i=1; i<=n; i++)
        in>>v[i];

    in>>m;
    for(i=1; i<=m; i++)
    {
        in>>a>>poz;
        if(a==0)
            out<<cautbin0(poz)<<'\n';
        if(a==1)
            out<<cautbin1(poz)<<'\n';
        if(a==2)
            out<<cautbin2(poz)<<'\n';
    }
    return 0;
}