Cod sursa(job #2611258)

Utilizator denisa.iordacheIordache Denisa-Elena denisa.iordache Data 6 mai 2020 16:47:15
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.17 kb
#include <iostream>
#include <fstream>

using namespace std;

int v[100001],N,M;

int CB0(int st, int dr, int x)

{   return 0;
    int mij;
    if(st<=dr)
    {
        mij=st+(dr-st)/2;
        if(v[mij]==x && v[mij+1]!=x) return mij;
        else
            if(x<v[mij]) return CB0(st,mij-1,x);
        else return CB0(mij+1,dr,x);
    }
    else return -1;
}

int CB1(int st, int dr, int x)
{
    int mij;
    if(st<=dr)
    {
        mij=st+(dr-st)/2;
       if(x>=v[mij]) return CB1(mij+1,dr,x);
       else return CB1(st,mij-1,x);
    }
    else
    return dr;
}

int CB2(int st,int dr,int x)
{
    int mij;
    if(st<=dr)
    {
        mij=st+(dr-st)/2;
        if(x>v[mij]) return CB2(mij+1,dr,x);
        else return CB2(st,mij-1,x);
    }
    else return st;
}

int main()
{
    ifstream f("cautbin.in");
    ofstream g ("cautbin.out");
    int op,val;
    f>>N;
    for (int i=1;i<=N;i++) f>>v[i];
    f>>M;
    for(int i=0;i<M;i++)
        {f>>op>>val;
        if(op==0) g<<CB0(1,N,val)<<endl;
        else
            if(op==1)g<<CB1(1,N,val)<<endl;
        else
            g<<CB2(1,N,val)<<endl;}

    return 0;
}