Cod sursa(job #2072191)

Utilizator dariaana15Corpaci Daria dariaana15 Data 21 noiembrie 2017 16:03:10
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.12 kb
#include <iostream>
#include<fstream>
using namespace std;

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

const int L=16;

int n, v[100001];
int funct0(int x)
{
    int r=0;
    int pas=1<<L;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r=r+pas;
        }
        pas=pas/2;
    }
    if(v[r]!=x)
    {
        r=-1;
    }
    return r;
}
int funct1(int x)
{
    int  r=0;
    int pas=1<<L;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<n)
        {
            r=r+pas;
        }
        pas=pas/2;
    }
    return r;
}
int funct2(int x)
{
    int r=0;
    int pas=1<<L;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<x)
        {
            r=r+pas;
        }
        pas=pas/2;
    }
    r++;
    return r;
}
int main()
{
    int a,m,x;
    f>>n;
    for(int i=1; i<=n; i++)
    {
        f>>v[i];
    }
    f>>m;
    while(m!=0)
        {
            f>>a>>x;
            if(a==0)
                g<<funct0(x)<<endl;
            if(a==1)
                g<<funct1(x)<<endl;
            if(a==2)
                g<<funct2(x)<<endl;
            m--;
        }
    return 0;
}