Cod sursa(job #1586398)

Utilizator stefii_predaStefania Preda stefii_preda Data 1 februarie 2016 09:08:52
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.12 kb
#include <cstdio>
#define L 16
#define Max 100003

using namespace std;
int a[Max], n;

int cautare0(int x)
{
    int i= 0, pas;
    pas= 1<<L;
    while(pas)
    {
        if(i+pas <=n && a[i+pas]<=x)
            i+=pas;
        pas/= 2;
    }
    if(a[i]==x) return i;
    return -1;
}

int cautare1(int x)
{
    int i= 0, pas;
    pas= 1<<L;
    while(pas)
    {
        if(i+pas <=n && a[i+pas]<=x)
            i+=pas;
        pas/= 2;
    }
    return i;
}

int cautare2(int x)
{
    int i= 0, pas;
    pas= 1<<L;
    while(pas)
    {
        if(i+pas<=n && a[i+pas]<x)
            i+=pas;
        pas/= 2;
    }
    return i+1;
}

int main()
{
    freopen("cautbin.in", "r", stdin);
    freopen("cautbin.out", "w", stdout);
    int i, m, ind, nr, af;
    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", &ind, &nr);
        if(ind==0) af= cautare0(nr);
        if(ind==1) af= cautare1(nr);
        if(ind==2) af= cautare2(nr);
        printf("%d\n", af);
    }

    return 0;
}