Cod sursa(job #2366751)

Utilizator qwerty1234qwerty qwerty1234 Data 4 martie 2019 21:59:55
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.32 kb

#include <bits/stdc++.h>


using namespace std;

ifstream fin ("cautbin.in");
ofstream fout ("cautbin.out");

const int Nmax = 1e5 + 5;

int a[Nmax] , n , q;

int main()
{
    int op , x , L , R , m , p;
    fin >> n;
    for(int i = 1 ; i <= n ; i++)
        fin >> a[i];
    fin >> q;
    while(q--)
    {
        fin >> op >> x;
        p = -1;
        L = 1;
        R = n;
        if(op == 0)
        {
            while(L <= R)
            {
                m = (L + R) / 2;
                if(a[m] == x)
                    p = m , L = m + 1;
                else if(a[m] < x)
                    L = m + 1;
                else R = m - 1;
            }
            fout << p << "\n";
        }
        else if(op == 1)
        {
             while(L <= R)
            {
                m = (L + R) / 2;
                if(a[m] <= x)
                    p = m , L = m + 1;
                else
                   R = m - 1;
            }
            fout << p << "\n";
        }
        else
        {
             while(L <= R)
            {
                m = (L + R) / 2;
                if(a[m] >= x)
                    p = m , R = m - 1;
                else L = m + 1;
            }
            fout << p << "\n";
        }
    }
    fin.close();
    fout.close();
}