Cod sursa(job #1264103)

Utilizator calinalexandruAlexandru Calin calinalexandru Data 15 noiembrie 2014 15:32:06
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.41 kb
#include <fstream>
using namespace std;
ifstream in("cautbin.in");
ofstream out("cautbin.out");
int main()
{
    int n,v[100002],i,j,m,mij,op,x,st,dr,sol;
    in>>n;
    for(i=1; i<=n; i++)
        in>>v[i];
    in>>m;
    for(i=1; i<=m; i++)
    {
        in>>op>>x;
        st=1;
        dr=n;
        sol=-1;
        if(op==0)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(x<v[mij]) dr=mij-1;
                if(x>v[mij]) st=mij+1;
                if(x==v[mij])
                {
                    sol=mij;
                    break;
                }
            }
            out<<sol<<'\n';
        }
        sol=-1;
        st=1;
        dr=n;
        if(op==1)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]<=x)
                {
                    sol=mij;
                    st=mij+1;
                }
                else dr=mij-1;
            }
            out<<sol<<'\n';
        }
        sol=-1;
        st=1;
        dr=n;
        if(op==2)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]>=x)
                {
                    sol=mij;
                    dr=mij-1;
                }
                else st=mij+1;
            }
            out<<sol<<'\n';
        }
    }
}