Cod sursa(job #2427848)

Utilizator Mircea79Lacatus Mircea Mircea79 Data 2 iunie 2019 14:23:25
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.15 kb
#include<fstream>
using namespace std;
ifstream in("cautbin.in");
ofstream out("cautbin.out");
int v[1000000];
int main ()
{
    int n,m,i,x,y,msk,pos=0;
    in>>n;
    for(i=1; i<=n; i++)
        in>>v[i];
    in>>m;
    while(m!=0)
    {
        in>>y;
        if(y==0)
        {
            in>>x;
            pos=0;
            for(msk=1<<20; msk>0; msk/=2)
            {
                if(pos+msk<=n && v[pos+msk]<=x)
                    pos+=msk;
            }
            if(v[pos]==x)
                out<<pos<<'\n';
            else
                out<<-1<<'\n';
        }
       if(y==1)
        {
            in>>x;
            pos=0;
            for(int msk=1<<20; msk>0; msk/=2)
            {
                if(pos+msk<=n && v[pos+msk]<=x)
                    pos+=msk;
            }
            out<<pos<<'\n';
        }
        if(y==2)
        {
            in>>x;
            pos=0;
            for(msk=1<<20; msk>0; msk/=2)
            {
                if(pos+msk<=n && v[pos+msk]<x)
                    pos+=msk;
            }
        out<<pos+1<<'\n';
        }
        m--;

    }
    return 0;
}