Cod sursa(job #1491880)

Utilizator EuEricCiordel Rromeo EuEric Data 26 septembrie 2015 12:29:39
Problema Cautare binara Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 1.5 kb
#include<fstream>
using namespace std;
int v[100001];
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    int n,m,st,dr,mij,x,ans=-1,ans1,i,a,ans2;
    f>>n;
    dr=n;
    for(i=1;i<=n;++i)
       f>>v[i];
    f>>m;
    for(i=1;i<=m;++i)
    {
        st=1;
        dr=n;
        f>>a>>x;
        if(a==1)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]<=x)
                {
                    ans1=mij;
                    st=mij+1;
                }
                else
                    dr=mij-1;
            }
            g<<ans1<<endl;
        }
        else if(a==0)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]==x)
                {
                    ans=mij;
                    st=mij+1;
                }
                else if(v[mij]<x)
                    st=mij+1;
                else
                    dr=mij-1;
                }
                g<<ans<<endl;
            }
            else if(a==2)
                {
                    while(st<=dr)
                    {
                    mij=(st+dr)/2;
                    if(v[mij]>=x)
                    {
                        ans2=mij;
                        dr=mij-1;
                    }
                    else
                        st=mij+1;

                    }
                    g<<ans2<<endl;
                }
    }
}