Cod sursa(job #1344916)

Utilizator IridonStefanIridon Stefan IridonStefan Data 17 februarie 2015 08:45:54
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.35 kb
#include <iostream>
#include <fstream>
using namespace std;
int a[100000];
int bin0(int p,int u,int x)
    {
        int m;
        while (p<=u)
        {
            m=(p+u)/2;
            if (a[m]<=x)
                p=m+1;
            else
                u=m-1;
        }
        m=(p+u)/2;
        if (a[m]>x) m--;
        if (a[m]==x)
            return m;
        return -1;
    }
int bin1(int p,int u,int x)
    {
        int m;
        while (p<=u)
        {
            m=(p+u)/2;
            if (a[m]<=x)
                p=m+1;
            else
                u=m-1;
        }
        m=(p+u)/2;
        if (a[m]>x) m--;
            return m;

    }
int bin2(int p,int u,int x)
    {
        int m;
        while (p<=u)
        {
            m=(p+u)/2;
            if (a[m]<x)
                p=m+1;
            else
                u=m-1;
        }
        m=(p+u)/2;
        if (a[m]<x) m++;
            return m;

    }
int main()
{
    ifstream f("in.txt");
    ofstream g("out.txt");
    int n,i,m,x,y;
    f>>n;
    for (i=1;i<=n;i++)
        f>>a[i];
    f>>m;
    for (i=1;i<=m;i++)
    {
        f>>x>>y;
        if (x==0)
            g<<bin0(1,n,y)<<'\n';
        if (x==1)
            g<<bin1(1,n,y)<<'\n';
        if (x==2)
            g<<bin2(1,n,y)<<'\n';
    }


    return 0;
}