Cod sursa(job #2717881)

Utilizator andreiferariu2005Ferariu Ioan Andrei andreiferariu2005 Data 8 martie 2021 09:43:32
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.66 kb
#include <fstream>
# define NM 100001
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int a[NM],n,m,i,c,x;
void cautabinar0()
{
    int st,dr,mij,poz=-1;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(a[mij]==x)
        {
            poz=mij;
            st=mij+1;
        }
        else
            if(a[mij]>x)
                dr=mij-1;
            else
                st=mij+1;
    }
    fout<<poz<<"\n";
}
void cautabinar1()
{
  int st,dr,mij,poz;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(a[mij]<=x)
        {
            poz=mij;
            st=mij+1;
        }
        else
            dr=mij-1;

    }
    fout<<poz<<"\n";
}
void cautabinar2()
{
    int st,dr,mij,poz;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(a[mij]>=x)
        {
            poz=mij;
            dr=mij-1;
        }
        else
            st=mij+1;
    }
    fout<<poz<<"\n";
}
int main()
{
    fin>>n;

    for(i=1;i<=n;i++)
        fin>>a[i];

    fin>>m;

    for(int j=1;j<=m;j++)
    {
        fin>>c>>x;
        switch(c)
            {
            case 0:
                {
                    cautabinar0();
                    break;
                }
            case 1:
                {
                    cautabinar1();
                    break;
                }
            default:
                {
                    cautabinar2();
                    break;
                }
            }

    }

    return 0;
}

/**
5
1 3 3 3 5
3
0 3
1 3
2 3

4
4
2
**/