Cod sursa(job #2574914)

Utilizator IoanaRuginosuRuginosu Ioana IoanaRuginosu Data 6 martie 2020 10:39:45
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.54 kb
#include <fstream>

using namespace std;
ifstream fin ("cautbin.in");
ofstream fout ("cautbin.out");
int n, v[100001], m, a, x, b, mij, st, dr;
int main()
{
    fin >> n;
    for (int i=1; i<=n; i++)
        fin >> v[i];
    fin >> m;
    for (int i=1; i<=m; i++)
    {
        fin >> a >> x;
        if (a==0)
        {
            st=1;
            dr=n;
            b=-1;
            while (st<=dr)
            {

                mij=(st+dr)/2;
                if (v[mij]==x)
                {
                    b=mij;
                    st=mij+1;
                }
                else if (x>v[mij])
                    st=mij+1;
                else
                    dr=mij-1;
            }
            fout << b << '\n';
        }
        if (a==1)
        {
            st=1;
            dr=n;
            while (st<=dr)
            {

                mij=(st+dr)/2;
                if (x>=v[mij])
                {
                    b=mij;
                    st=mij+1;
                }
                else
                    dr=mij-1;
            }
            fout << b << '\n';
        }
        if (a==2)
        {
            st=1;
            dr=n;
            while (st<=dr)
            {

                mij=(st+dr)/2;
                if (v[mij]>=x)
                {
                    b=mij;
                    dr=mij-1;
                }
                else
                    st=mij+1;
            }
            fout << b << '\n';
        }
    }
    return 0;
}