Cod sursa(job #2342370)

Utilizator vladrataRata Vlad Daniel vladrata Data 12 februarie 2019 19:22:53
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.36 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 fin("cautbin.in");
    ofstream fout("cautbin.out");
    int i,a,poz;
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>a>>poz;
        if(a==0)
            fout<<cautbin0(poz)<<"\n";
        if(a==1)
            fout<<cautbin1(poz)<<"\n";
        if(a==2)
            fout<<cautbin2(poz)<<"\n";
    }
    return 0;
}