Cod sursa(job #2074498)

Utilizator Davla2Stancu Vlad Davla2 Data 24 noiembrie 2017 17:50:19
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.11 kb
#include <fstream>

using namespace std;

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

const int L=16;
const int N=100001;
int n,v[N];

int caut0(int x)
{
    int r=0,pas=1<<L;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r+=pas;
        }
        pas/=2;
    }
    if(v[r]!=x)
    {
        r=-1;
    }
    return r;
}

int caut1(int x)
{
    int r=0,pas=1<<L;
    while(pas!=0)
    {
        if(r+pas<=n && v[r+pas]<=x)
        {
            r+=pas;
        }
        pas/=2;
    }
    return r;
}

int caut2(int x)
{
    int r=0,pas=1<<L;
    while(pas!=0)
    {
        if(r+pas<=n && !(v[r+pas]>=x))
        {
            r+=pas;
        }
        pas/=2;
    }
    r++;
    return r;
}

int main()
{
    int m,tip,x;
    in>>n;
    for(int i=1; i<=n; i++) in>>v[i];
    in>>m;
    for(int i=1; i<=m; i++)
    {
        in>>tip>>x;
        if(tip==0)
        {
            out<<caut0(x);
        }
        else if(tip==1)
        {
            out<<caut1(x);
        }
        else if(tip==2)
        {
            out<<caut2(x);
        }
        out<<"\n";
    }
    return 0;
}