Cod sursa(job #2206967)

Utilizator filiptudose2007Tudose Filip filiptudose2007 Data 24 mai 2018 17:15:30
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.52 kb
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,i,m,sol,st,dr,mij,v[100005],op,x;
int main()
{
    f>>n;
    for(i=1; i<=n; ++i)
        f>>v[i];
    f>>m;
    for(i=1; i<=m; ++i)
    {
        f>>op>>x;
        sol=-1;
        st=1;
        dr=n;
        if(op==0)
        {
            while(st<=dr)
            {
                mij=(st+dr)/2;
                if(v[mij]==x)
                {
                    sol=mij;
                    st=mij+1;
                }

                else if(v[mij]<x)
                    st=mij+1;
                else if(v[mij]>x)
                    dr=mij-1;
            }
        }
            else if(op==1)
            {

                while(st<=dr)
                {
                    mij=(st+dr)/2;
                    if(v[mij]<=x)
                    {
                        sol=mij;
                        st=mij+1;
                    }
                    else if(v[mij]>x)
                        dr=mij-1;
                }

            }
            else if(op==2)
            {

                while(st<=dr)
                {
                    mij=(st+dr)/2;
                    if(v[mij]>=x)
                    {
                        sol=mij;
                        dr=mij-1;
                    }
                    else if(v[mij]<x)
                        st=mij+1;
                }

            }
            g<<sol<<"\n";
        }
        return 0;
    }