Cod sursa(job #1744946)

Utilizator adimiclaus15Miclaus Adrian Stefan adimiclaus15 Data 20 august 2016 19:09:52
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1 kb
#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
unsigned long a[100100],n,m,i,t,x,*p,y;
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    f>>n;
    for(i=0;i<n;i++)
    {
        f>>a[i];
    }
    f>>m;
    for(i=1;i<=m;i++)
    {
        f>>t>>x;
        if(t==0)
        {
            p=upper_bound(a,a+n,x);
            y=p-a-1;
            if(y>=0 && y<n && a[y]==x)
            {
                g<<y+1<<"\n";
            }
            else
            {
                g<<-1<<"\n";
            }
        }
        if(t==1)
        {
            p=lower_bound(a,a+n,x+1);
            y=p-a;
            if(a[y]==x)
            {
                g<<y+1<<"\n";
            }
            else
            {
                g<<y<<"\n";
            }
        }
        if(t==2)
        {
            p=upper_bound(a,a+n,x-1);
            y=p-a;
            g<<y+1<<"\n";
        }
    }
    return 0;
}