Cod sursa(job #2075714)

Utilizator Argint_TheodoraArgint Maria Theodora Argint_Theodora Data 25 noiembrie 2017 17:01:05
Problema Cautare binara Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 1.22 kb
#include <fstream>

using namespace std;

ifstream in("cautbin.in");
ofstream out("cautbin.out");
const int L=16;
int v[100000];
int n;

int caut0(int x)
{
    int pas=1<<L,r=0;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r+=pas;
        }
        pas/=2;
    }
    if(v[r]!=x)
    {
        r=-1;
    }
    return r;
}
int caut1(int x)
{
    int pas,r;
    pas=1<<L;
    r=0;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r+=pas;
        }
        pas/=2;
    }
    return r;
}
int caut2(int x)
{
    int pas,r;
    pas=1<<L;
    r=0;
    while(pas!=0)
    {
        if(r+pas<=n && !(v[r+pas]>=x))
        {
            r+=pas;
        }
        pas/=2;
    }
    r++;
    return r;
}
int main()
{
    int i,m,d,tip,x;
    in>>n;
    for(i=1;i<=n;i++)
    {
        in>>v[i];
    }
    in >> m;
    for(i=1;i<=m;i++)
    {
        in>>tip>>x;
        if(tip==0)
        {
            out<<caut0(x);
        }
        if(tip==1)
        {
            out<<caut1(x);
        }
        if(tip==2)
        {
            out<<caut2(x);
        }
        out << "\n";
    }

    return 0;
}