Cod sursa(job #2151210)

Utilizator EpureCarlaEpure Carla EpureCarla Data 4 martie 2018 11:21:37
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.29 kb
#include <fstream>
//#include <iostream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,i,v[100001],k,st,dr,mij,a,b,ok=0;
int main()
{
    fin>>n;
    for(i=1; i<=n; i++)
        fin>>v[i];
    fin>>k;
    for(i=1; i<=k; i++)
    {
        fin>>a>>b;
        if(a==0)
        {
            st=1;
            dr=n;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]<=b)
                    st=mij+1;
                else
                    dr=mij-1;
            }
            if(v[dr]!=b)
                fout<<-1<<'\n';
            else
                fout<<dr<<'\n';
        }
        if(a==1)
        {
            st=1;dr=n;ok=0;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]>b)
                    dr=mij-1;
                else
                    st=mij+1;
            }
            fout<<dr<<'\n';
        }
        if(a==2)
        {
            st=1;dr=n;
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]<b)
                    st=mij+1;
                else
                    dr=mij-1;
            }
            fout<<st<<'\n';
        }
    }
    return 0;
}