Cod sursa(job #1913419)

Utilizator mitroalexandru mitrofan mitro Data 8 martie 2017 12:50:10
Problema Cautare binara Scor 0
Compilator c Status done
Runda Arhiva educationala Marime 1.15 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream in("cautbin.in");
ofstream out("cautbin.out");
const int L = 16;
int n;
int v[100001];
int c0(int x)
{
    int pas;
    pas=1<<L;
    int 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 c1(int x)
{
    int pas;
    pas=1<<L;
    int r=0;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r+=pas;
        }
        pas/=2;
    }
    return r;
}
int c2(int x)
{
    int pas;
    pas=1<<L;
    int r=0;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<x)
        {
            r+=pas;
        }
        pas/=2;
    }
    return r+1;
}

int main()
{
    int x,k,c;
    in>>n;
    for(int p=1 ; p<=n ; p++)
    {
        in>>v[p];
    }
    in>>k;
    while(k>0)
    {
        in>>c;
        in>>x;
        if(c==0)
        {
            out<<c0(x)<<"\n";
        }
        if(c==1)
        {
            out<<c1(x)<<"\n";
        }
        if(c==2)
        {
            out<<c2(x)<<"\n";
        }
        k--;
    }
    return 0;
}