Cod sursa(job #2775953)

Utilizator amunnumeVlad Patrascu amunnume Data 18 septembrie 2021 11:48:35
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.24 kb
#include <fstream>
using namespace std;
ifstream cin("cautbin.in");
ofstream cout("cautbin.out");
int n,v[100005],i,q,j,p,x,m,st,dr,poz;
int main()
{
    cin>>n;
    for(i=1; i<=n; i++)
        cin>>v[i];
    cin>>q;
    for(j=1; j<=q; j++)
    {
        cin>>p>>x;
        if(p==0)
        {
            st=1;
            dr=n;
            poz=-1;
          while(st<=dr)
            {
                m=(st+dr)/2;
                if(v[m]==x && m>poz) poz=m;
                if(v[m]<=x) st=m+1;
                else dr=m-1;

            }
            cout<<poz<<'\n';
        }
        else if(p==1)
        {
            st=1;
            dr=n;
            poz=-1;
        while(st<=dr)
            {
                m=(st+dr)/2;
                if(v[m]<=x && m>poz) poz=m;
                if(v[m]<=x) st=m+1;
                else dr=m-1;

            }
            cout<<poz<<'\n';
        }
        else
        {
            st=1;
            dr=n;
            poz=-1;
         while(st<=dr)
            {
                m=(st+dr)/2;
                if(v[m]>=x) poz=m;
                if(v[m]<x) st=m+1;
                else dr=m-1;
            }
            cout<<poz<<'\n';
        }}
        return 0;}