Cod sursa(job #3210663)

Utilizator Floroiu_MariusFloroiu Marius Cristian Floroiu_Marius Data 6 martie 2024 23:22:39
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.4 kb
#include <fstream>

using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,v[100003],m,c,x,st,dr,mij;
int main()
{
    fin>>n;
    for (int i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    while (m--)
    {
        fin>>c>>x;
        if (c==0)
        {
            st=1;
            dr=n;
            while (st<=dr)
            {
                mij=(st+dr);
                mij=(mij>>1);
                if (v[mij]<=x)
                    st=mij+1;
                else
                    dr=mij-1;
            }
            if (v[dr]==x && dr!=0)
                fout<<dr;
            else fout<<-1<<'\n';
        }
        else if (c==1)
        {
            st=1;
            dr=n;
            while (st<=dr)
            {
                mij=(st+dr);
                mij=(mij>>1);
                if (v[mij]<=x)
                    st=mij+1;
                else
                    dr=mij;
            }
            if (v[dr]>x) dr--;
            fout<<dr<<'\n';
        }
        else
        {
            st=1;
            dr=n;
            while (st<dr)
            {
                mij=(st+dr);
                mij=(mij>>1);
                if (v[mij]<x)
                    st=mij+1;
                else
                    dr=mij;
            }
            if (v[st]<x) st--;
            fout<<st<<'\n';
        }
    }
}