Cod sursa(job #2071279)

Utilizator MaxTeoTeo Oprescu MaxTeo Data 20 noiembrie 2017 15:51:40
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.02 kb
#include <bits/stdc++.h>
#define NMAX 100001
using namespace std;

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

int n,v[NMAX],m;

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

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

int main()
{
    int m,op,x;
    f>>n;
    for(int i=1;i<=n;++i)
        f>>v[i];
    f>>m;
    while(m--)
    {
        f>>op>>x;
        g<<bs(x,op)<"\n";
    }
    return 0;
}