Cod sursa(job #1631141)

Utilizator bogdan.balanBogdan Balan bogdan.balan Data 5 martie 2016 13:19:49
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.54 kb
#include <fstream>

using namespace std;
ifstream in("cautbin.in");
ofstream out("cautbin.out");
int v[100001],n,m;
int zero(int x)
{
    int m, st=1, dr=n, ok=0;
    while( st<=dr)
    {
        m=( st+dr)/2;
        if( x==v[m])
        {
            ok=1;
            if( st==dr)
                return st;
            else
                st=m+1;
        }
        else if( x>v[m])
            st=m+1;
        else
            dr=m-1;
    }
    if( ok)
        return st-1;
    else
        return -1;
}
int unu( int x)
{
    int m,st=1,dr=n,ok=0;
    while(st<=dr)
    {
        m=(st+dr)/2;
        if(x==v[m])
        {
            ok=1;
            if(st==dr)
                return st;
            else
                st=m+1;
        }
        else if(x>v[m])
            st=m+1;
        else
            dr=m-1;
    }
    return st-1;
}
int doi( int x)
{
    int m,st=1,dr=n,ok=0;
    while(st<=dr)
    {
        m=(st+dr)/2;
        if(x==v[m])
        {
            ok=1;
            if(st==dr)
            return st;
            else
            dr=m-1;
        }
        else if(x>v[m])
        st=m+1;
        else
         dr=m-1;
    }
    return dr+1;
}
int main()
{
    int i, w, x;
    in>>n;
    for( i=1; i<=n; i++)
        in>>v[i];
    in>>m;
    while( m)
    {
        in>>w>>x;
        if( w==0)
        out<<zero( x)<<'\n';
        if( w==1)
        out<<unu( x)<<'\n';
        if( w==2)
        out<<doi( x)<<'\n';
        m--;
    }

return 0;
       }