Cod sursa(job #1411648)

Utilizator andreeainfo_dAndreea Dutulescu andreeainfo_d Data 31 martie 2015 21:00:41
Problema Cautare binara Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 0.85 kb
#include <cstdio>
int i,n,j,p,tip,a[10000],x,ii,m;
int main()
{
    freopen("cautbin.in","r",stdin);
    freopen("cautbin.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%d",&a[i]);
    }
    for(j=1;j<=n;j<<=1);
    //pentru 0 si 1
    scanf("%d",&m);
    for(ii=1;ii<=m;ii++)
    {
        scanf("%d%d",&tip,&x);
    if(tip==0)
    {
    p=0;
    for(i=j;i>=1;i>>=1)
    {
        if(p+i<=n&&a[p+i]<=x)p=p+i;
    }
        if(a[p]==x)printf("%d\n",p);
        else printf("-1\n");
    }
    if(tip==1)
    {
    p=0;
    for(i=j;i>=1;i>>=1)
    {
        if(p+i<=n&&a[p+i]<=x)p=p+i;
    }
        printf("%d\n",p);
    }
    if(tip==2)
    {
        p=n;
        for(i=j;i>=1;i>>=1)
        {
            if(p-i>=1&&a[p-i]>=x)p=p-i;
        }
        printf("%d\n",p);
    }}
    return 0;
}