Cod sursa(job #2360032)

Utilizator 566577Cont566 566577 Data 1 martie 2019 11:49:23
Problema Cautare binara Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.23 kb
#include <iostream>
#include <fstream>
using namespace std;

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

int n, m, v[100005];

int binar0(int x)
{
    int st=1, dr=n, mid, poz=0;
    while(st<=dr)
    {
        mid=(st+dr)/2;
        if(v[mid]==x)
            return mid;
        if(v[mid]<x)
            st=mid+1;
        else
            dr=mid-1;
    }
    return -1;
}

int binar1(int x)
{
    int st=1, dr=n, mid;
    while(st<=dr)
    {
        mid=(st+dr)/2;
        if(v[mid]>x)
            dr=mid-1;
        else
            st=mid+1;

    }

    return st-1;
}

int binar2(int x)
{
    int st=1, dr=n, mid;
    while(st<=dr)
    {
        mid=(st+dr)/2;
        if(v[mid]<x)
            st=mid+1;
        else
            dr=mid-1;

    }

    return st;
}

void Rezolva()
{
    int aux1, aux2;

    fin>>n;
    for(int i=1; i<=n; i++)
        fin>>v[i];

    fin>>m;
    for(int i=1; i<=m; i++)
    {
        fin>>aux1>>aux2;
        if(aux1==0)
            fout<<binar0(aux2)<<endl;
        else if(aux1==1)
            fout<<binar1(aux2)<<endl;
        else
            fout<<binar2(aux2)<<endl;
    }
}

int main()
{
    Rezolva();
    return 0;
}