Cod sursa(job #1744883)

Utilizator adimiclaus15Miclaus Adrian Stefan adimiclaus15 Data 20 august 2016 17:30:33
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.09 kb
#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;

int main()
{
    int a[100001],n,m,i,t,x,p;
    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)-a;
            if(p>=0 && p<n && a[p-1]==x)
            {
                g<<p<<"\n";
            }
            else
            {
                g<<-1<<"\n";
            }
        }
        if(t==1)
        {
            p=upper_bound(a,a+n,x)-a;
            if(p>=0 && p<n && a[p-1]<=x)
            {
                g<<p<<"\n";
            }
        }
        if(t==2)
        {
            p=lower_bound(a,a+n,x)-a;
            if(p>=0 && p<n)
            {
                if(a[p]==x)
                {
                    g<<p+1<<"\n";
                }
                else
                {
                    g<<p+2<<"\n";
                }
            }
        }
    }
    return 0;
}