Cod sursa(job #1509916)

Utilizator ilinoiuflaviusIlinoiu Flavius ilinoiuflavius Data 24 octombrie 2015 13:51:23
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.41 kb
#include <iostream>
#include <fstream>
using namespace std;

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

int n,m,v[100001];
int bin0(int x)
{
    int d=n,s=1,mij,poz=-1;
    while(s<=d)
    {
        mij=(s+d)/2;
        if(x>v[mij])
        {
            s=mij+1;
        }
        else if(x<v[mij])
        {
            d=mij-1;
        }
        else if(x==v[mij])
        {
            poz=mij;
            s=mij+1;
        }
    }
    return poz;
}
int bin1(int x)
{
    int d=n,s=1,mij,poz=0;
    while(s<=d)
    {
        mij=(s+d)/2;
        if(x>=v[mij])
        {
            s=mij+1;
            poz=mij;
        }
        else if(x<v[mij])
        {
            d=mij-1;
        }
    }
    return poz;
}
int bin2(int x)
{
    int d=n,s=1,mij,poz=0;
    while(s<=d)
    {
        mij=(s+d)/2;
        if(x>v[mij])
        {
            s=mij+1;
        }
        else if(x<=v[mij])
        {
            d=mij-1;
            poz=mij;
        }
    }
    return poz;
}
int main()
{
    int a,b;
    f>>n;
    for(int i=1;i<=n;i++)f>>v[i];
    f>>m;
    for(int i=1;i<=m;i++)
    {
        f>>a>>b;
        switch(a)
        {
            case 0: g<<bin0(b)<<"\n";
            break;

            case 1: g<<bin1(b)<<"\n";
            break;

            case 2: g<<bin2(b)<<"\n";
            break;
        }
    }
    return 0;
}