Cod sursa(job #2073117)

Utilizator syndicat3albu alex syndicat3 Data 22 noiembrie 2017 18:39:38
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.17 kb
#include <iostream>
#include <fstream>


using namespace std;
int n,v[100001];

int cautare0(int x)
{
    int r=0, pas=1<<16;

    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r+=pas;
        }
        pas/=2; // pas>>=1;
    }
    if(v[r]==x) return r;
    return -1;
}


int cautare1(int x)
{
    int r=0, pas=1<<16;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r+=pas;
        }
        pas/=2;// pas>>=1;
    }
    return r;
}

int cautare2 ( int x )
{

    int pas=1<<16;
    int r=0;
    while(pas!=0)
    {
        if(r+pas<=n&&v[r+pas]<x)
        {
            r+=pas;
        }
        pas/=2;
    }
    return r+1;
}

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

    int m,x,q,tip;
    fin>>n;
    for( int i=1; i<=n; i++)
        fin>>v[i];
    fin>>m;
    while(m!=0)
    {
        fin >> tip >> x;
        if (tip == 0)
        {
            fout << cautare0(x);
        }
        if (tip == 1)
        {
            fout <<cautare1(x);
        }
        if  (tip == 2)
        {
            fout << cautare2(x);
        }
        fout << "\n";
        m--;
    }
    return 0;
}