Cod sursa(job #1503047)

Utilizator OlivianOlivian Dan Cretu Olivian Data 15 octombrie 2015 14:59:08
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.89 kb
#include<cstdio>
#define NMAX 100007
using namespace std;
int v[NMAX],n,m,x,nr,p;
int cautbin(int value)
{
    int step = (1<<20), start = 1;
    for(;step; step>>=1)
    {
        int index = start + step;
        if(index > n) continue;
            if(v[index] <= value)
            {
                start = index;
            }
    }
    return start;
}
int main ()
{
    freopen("cautbin.in","r",stdin);
    freopen("cautbin.out","w",stdout);
    scanf("%d",&n);
    for(int i=1;i<=n;i++)
        scanf("%d",&v[i]);
    scanf("%d",&m);
    for (;m;--m)
    {
        scanf("%d %d",&nr,x);
        if(nr==0)
        {
            p=cautbin(x);
            if(v[p]==x) printf("%d\n",p);
            else printf("-1\n");

        }
        else if(nr==1)
        {
            printf("%d\n",cautbin(x));
        }
        else printf("%d\n",cautbin(x-1)+1);
    }
}