Cod sursa(job #2705600)

Utilizator Nicolae_CirleaNicolae Cirlea Nicolae_Cirlea Data 12 februarie 2021 22:47:27
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.33 kb
#include <iostream>
#include <fstream>
using namespace std;

ifstream f ("cautbin.in");
ofstream g ("cautbin.out");

int n, m, a[100001], x, i, p, st, dr, mij;

int main()
{
    f >> n;
    for (i=1; i<=n; i++)
        f >> a[i];

    f >> m;
    for (i=1; i<=m; i++)
    {
        f >> p >> x;
        st = 1;
        dr = n;

        if (p == 0)
        {
            while (st <= dr)
            {
                mij = (st + dr) / 2;
                if (x >= a[mij])
                    st = mij + 1;
                else
                    dr = mij - 1;
            }
            if (x == st)
                g << st << "\n";
            else
                g << -1 << "\n";
        }

        if (p == 1)
        {
            while (st <= dr)
            {
                mij = (st + dr) / 2;
                if (x >= a[mij])
                    st = mij + 1;
                else
                    dr = mij - 1;
            }
            g << st << "\n";
        }

        if (p == 2)
        {
            while(st <= dr)
            {
                mij = (st + dr) / 2;
                if (x <= a[mij])
                    dr = mij - 1;
                else
                    st = mij + 1;
            }
            g << dr << "\n";
        }

        return 0;
    }

}