Cod sursa(job #2711897)

Utilizator paulamariabirtaPaula Maria Birta paulamariabirta Data 24 februarie 2021 20:42:45
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.56 kb
#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("cautbin.in");
ofstream fout("cautbin.out");

int n,v[100001];

int CautareBinaraTip0(int x)
{
    int st,dr,mij,rezultat=-1;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            rezultat=mij;
            st=mij+1;
        }
        else if(x<v[mij])
                dr=mij-1;
             else
                st=mij+1;
    }
    return rezultat;
}



int CautareBinaraTip1(int x)
{
    int st,dr,mij,rezultat=-1;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
        {
            rezultat=mij;
            st=mij+1;
        }
        else if(x<v[mij])
                dr=mij-1;
    }
    return rezultat;
}

int CautareBinaraTip2(int x)
{
    int st,dr,mij,rezultat=-1;
    st=1;
    dr=n;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]>=x)
        {
            rezultat=mij;
            dr=mij-1;
        }
        else if(v[mij]<x)
                st=mij+1;
    }
    return rezultat;
}


int main()
{
    int x,i,nrIntrebari,a,b; ///a = tipul intrebarii
    fin>>n;
    for(i=1; i<=n; i++)
        fin>>v[i];
    fin>>nrIntrebari;
    for(i=1; i<=nrIntrebari; i++)
    {
        fin>>a>>b;
        if(a==0)
            fout<<CautareBinaraTip0(b)<<'\n';
        if(a==1)
            fout<<CautareBinaraTip1(b)<<'\n';
        if(a==2)
            fout<<CautareBinaraTip2(b)<<'\n';


    }
    return 0;
}