Cod sursa(job #1771526)

Utilizator pionierul22aNa LiZa pionierul22 Data 5 octombrie 2016 19:00:50
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.96 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int i,j,n,v[1000],a,b,m;
int zero(int v[],int n,int k)
{
    int mijl;
    int st=1, dr=n;
    while(st<=dr)
    {
        mijl=(st+dr)/2;
        if(v[mijl]<=k)
            st=mijl+1;
            else
            dr=mijl-1;
    }
    mijl=(dr+st)/2;
    return mijl;
}
int doi(int v[],int n,int k)
{
    int mijl;
    int st=1, dr=n;
    while(st<=dr)
    {
        mijl=(st+dr)/2;

        if(v[mijl]>=k)
            dr=mijl-1;
            else
            st=mijl+1;
    }

    return mijl;
}
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>a>>b;
        if(a==0 || a==1)
            if(v[zero(v,n,b)]!=b)
            fout<<-1<<'\n';
        else
            fout<<zero(v,n,b)<<'\n';

        if(a==2)
            fout<<doi(v,n,b)<<'\n';
    }
    return 0;
}