Cod sursa(job #1001797)

Utilizator horatiu11Ilie Ovidiu Horatiu horatiu11 Data 26 septembrie 2013 08:58:24
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.08 kb
# include <cstdio>
using namespace std;
int n,i,a[100001],m,t,x,mij,st,dr;
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]);
    scanf("%d",&m);
    for(i=1;i<=m;++i)
    {
        scanf("%d%d",&t,&x);
        st=0;dr=n+1;
        if(t==0)
        {
            while(st+1<dr)
            {
                mij=(st+dr)/2;
                if(x<a[mij])dr=mij;
                else st=mij;
            }
            if(a[st]==x)printf("%d\n",st);
            else printf("-1\n");
        }
        else if(t==1)
        {
            while(st+1<dr)
            {
                mij=(st+dr)/2;
                if(x>=a[mij])st=mij;
                else dr=mij;
            }
            printf("%d\n",st);
        }
        else
        {
            while(st+1<dr)
            {
                mij=(st+dr)/2;
                if(x<=a[mij])dr=mij;
                else st=mij;
            }
            printf("%d\n",dr);
        }
    }
    return 0;
}