Cod sursa(job #1596638)

Utilizator NGabrielGabriel Nicutari NGabriel Data 11 februarie 2016 11:21:01
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.12 kb
#include <fstream>

using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int v[100000],n;
int cautbin1(int x)
{
    int st=1;
    int dr=n;
    int mij;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)st=mij+1;
        else dr=mij-1;
    }
    return dr;
}

int cautbin0(int x)
{
    int st=1;
    int dr=n;
    int mij;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)st=mij+1;
        else dr=mij-1;
    }
    if(v[mij]==x)
        return dr;
    else return -1;
}

int cautbin2(int x)
{
    int st=1;
    int dr=n;
    int mij;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]>=x)st=mij+1;
        else dr=mij-1;
    }
    return st;
}


int main()
{
    ios_base::sync_with_stdio(false);
    int i,M,caz,ind;
    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    f>>M;
    while(M)
    {
      f>>caz;
      f>>ind;
      if(caz==0)
        g<<cautbin0(ind);
      if(caz==1)
        g<<cautbin1(ind);
      if(caz==2)
        g<<cautbin2(ind);
      g<<'\n';
    M--;
    }
    return 0;
}