Cod sursa(job #2436637)

Utilizator baragan30Baragan Andrei baragan30 Data 6 iulie 2019 15:35:42
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.37 kb
#include <fstream>

using namespace std;
ifstream fin ("cautbin.in");
ofstream fout ("cautbin.out");
int v[100001], n, i, intrebari, x, tip;
int cautbinar1(int x)
{
    int st=1;
    int dr=n;
    int nr=-1, mij;
    while(st<=dr)
    {
        mij=(dr+st)/2;
        if(v[mij]==x)
        {
            nr=mij;
            st=mij+1;
        }
        else if(v[mij]>x)
            dr=mij-1;
        else if(v[mij]<x)
            st=mij+1;
    }
    return nr;
}
int cautbinar2(int x)
{
    int st=1;
    int dr=n;
    int nr, mij;
    while(st<=dr)
    {
        mij=(dr+st)/2;
        if(v[mij]<=x)
        {
            st=mij+1;
            nr=mij;
        }
        else dr=mij-1;
    }
    return nr;
}
int cautbinar3(int x)
{
    int st=1;
    int dr=n;
    int nr, mij;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(v[mij]>=x)
        {
            dr=mij-1;
            nr=mij;
        }
        else st=mij+1;
    }
    return nr;
}
int main()
{
    fin >> n;
    for(i=1;i<=n;i++)
        fin >> v[i];
    fin >> intrebari;
    for(i=1;i<=intrebari;i++)
    {
        fin >> tip >> x;
        if(tip==0)
            fout << cautbinar1(x) << '\n';
        else if(tip==1)
            fout << cautbinar2(x) << '\n';
        else if(tip==2)
            fout << cautbinar3(x) << '\n';
    }
    return 0;
}