Cod sursa(job #2795317)

Utilizator andreea13gaftonGafton Andreea andreea13gafton Data 6 noiembrie 2021 11:10:07
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.77 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int n, a[100001], x, l, p, c, nr_cerinte;

int main()
{
    f>>n;
    for(int i=1; i<=n; ++i)
        f>>a[i];
    f>>nr_cerinte;
    for(int j=0; j<nr_cerinte; ++j)
    {
        f>>c>>x;
          int i;
    p=1;
     while(p<n)
        p<<=1;
    for(i=1, l=p; l>0; l>>=1)
        if(i+l<=n && a[i+l]<=x)
            i+=l;

    if(c==0)
    {
        if(a[i]==x)
            g<<i;
        else
            g<<-1;
        g<<'\n';
    }
    if(c==1)
        g<<i<<'\n';
    if(c==2)
    {
        for(i=n, l=p; l>0; l>>=1)
        if(i-l>=1 && a[i-l]>=x)
            i-=l;
        g<<i<<'\n';
    }
    }


    return 0;
}