Cod sursa(job #1314493)

Utilizator alinmocanu95FMI Alin Mocanu alinmocanu95 Data 11 ianuarie 2015 22:00:43
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.35 kb
#include<iostream>
#include<fstream>
using namespace std;
int s,d,n,m,a[100000],i,o,st,dr,p,x,op,stanga,dreapta;
int caut (int s, int d)
{
    if(s>d)
        return -1;
    else
        {
            p =(s+d)/2;
            if (x==a[p])
                return p;
            if (x<a[p])
                {stanga=s;dreapta=p-1; return caut(s,p-1); }
            else
                {stanga=p+1;dreapta=d; return caut(p+1,d); }
        }
}
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    f>>n;
    for(i=1;i<=n;i++) f>>a[i];
    f>>m;
    while(m>0)
    {
        f>>op>>x;
        if(op==0)
        {st=1; dr=n; o=-1;
            while(caut(st,dr)!=-1)
                {o=caut(st,dr);
                st=o+1;}
                g<<o<<"\n";
        }
        else if (op==1)
        {st=1; dr=n; o=-1;
        if(caut(st,dr)==-1) {caut(st,dr); g<<dreapta<<"\n";}
           else {while(caut(st,dr)!=-1)
                {o=caut(st,dr);
                st=o+1;}
                g<<o<<"\n";}
        }
        else
        {st=1; dr=n; o=-1;
        if(caut(st,dr)==-1) {caut(st,dr); g<<stanga<<"\n";}
           else {while(caut(st,dr)!=-1)
                {o=caut(st,dr);
                dr=o-1;}
                g<<o<<"\n";}
        }
        m--;
    }
    f.close();
    g.close();
    return 0;

}