Cod sursa(job #1497843)

Utilizator blu3pirateNancu Cristian blu3pirate Data 7 octombrie 2015 16:42:22
Problema Cautare binara Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 2.78 kb
#include <fstream>

using namespace std;

ifstream f("cautbin.in");
ofstream g("cautbin.out");

int main()
{   int n,m,i,v[100001],q,nr,min,max,mid,a;
    f>>n;
    for(i=1;i<=n;++i) f>>v[i];
    f>>m;
    for(i=0;i<m;++i)
    {
        f>>q>>nr;
        if(q==0)
        {   a=0;
            min=1;
            max=n;
            while(min<=max)
            {
                mid=min+(max-min)/2;
                if(v[mid]==nr)
                {   a=mid;
                    min=mid+1;
                    while(min<=max)
                    {
                        mid=min+(max-min)/2;
                        if(v[mid]==nr)
                        {
                            a=mid;
                            min=mid+1;
                        }
                        else max=mid-1;
                    }
                }

                else if(v[mid]<nr) min=mid+1;
                else max=mid-1;
            }
            if(a) g<<a<<'\n';
            else g<<"-1\n";
        }
        else if(q==1)
        {   a=0;
            min=1;
            max=n;
            while(min<=max)
            {
                mid=min+(max-min)/2;
                if(v[mid]<=nr)
                {   a=mid;
                    min=mid+1;
                    while(min<=max)
                    {
                        mid=min+(max-min)/2;
                        if(v[mid]<=nr)
                        {
                            a=mid;
                            min=mid+1;
                        }
                        else max=mid-1;
                    }
                }
                else max=mid-1;
            }
            g<<a<<'\n';
        }
        else
        {   a=0;
            min=1;
            max=n;
            while(min<=max)
            {
                mid=min+(max-min)/2;
                if(v[mid]>=nr)
                {   a=mid;
                    max=mid-1;
                    while(min<=max)
                    {
                        mid=min+(max-min)/2;
                        if(v[mid]>=nr)
                        {
                            a=mid;
                            max=mid-1;
                        }
                        else min=mid+1;
                    }
                }
                else min=mid-1;
            }
            g<<a<<'\n';
        }
    }

    return 0;
}

/*
int mid,max,min;
        min=1;
        max=n;
        while(min<=max)
        {   mid=min+(max-min)/2;
            if(v[mid]==c)
            {
                cout<<mid<<'\n';
                return 0;
            }
            else if(v[mid]<c){
                min=mid+1;
            }
            else max=mid-1;
        }
        cout<<"target not found\n";
*/