Cod sursa(job #1510194)

Utilizator StefaanStefanescu Stefan Stefaan Data 24 octombrie 2015 17:53:49
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.29 kb
#include <fstream>
using namespace std;
int n,m,v[100001];

int bin0(int x)
{
    int i=1,j=n,mij,poz=-1;
    while(i<=j)
    {
        mij=i+(j-i)/2;
        if(x>v[mij])
            i=mij+1;
        else if(x<v[mij])
            j=mij-1;
        else if(x==v[mij])
        {
            poz=mij;
            i=mij+1;
        }
    }
    return poz;
}
int bin1(int x)
{
    int i=1,j=n,mij,poz=0;
    while(i<=j)
    {
        mij=i+(j-i)/2;
        if(x>=v[mij])
        {
            i=mij+1;
            poz=mij;
        }
        else if(x<v[mij])
            j=mij-1;
    }
    return poz;
}
int bin2(int x)
{
    int i=1,j=n,mij,poz=0;
    while(i<=j)
    {
        mij=i+(j-i)/2;
        if(x>v[mij])
            i=mij+1;
        else if(x<=v[mij])
        {
            j=mij-1;
            poz=mij;
        }
    }
    return poz;
}
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    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;
        if(a==0)
            g<<bin0(b)<<"\n";
        else if(a==1)
            g<<bin1(b)<<"\n";
            else g<<bin2(b)<<"\n";
    }
    f.close();
    g.close();
    return 0;
    return 0;
}