Cod sursa(job #1301648)

Utilizator refugiatBoni Daniel Stefan refugiat Data 26 decembrie 2014 11:47:35
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 2.01 kb
#include<iostream>
#include<fstream>
#include<stdio.h>
#include<algorithm>
#include<climits>
using namespace std;
int c0(int v[],int n,int x)
{
    int st,dr,mij;
    st=0;
    dr=n-1;
    int poz=-2;
    while(st<dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            poz=mij;
            st=mij+1;
        }
        else
            if(v[mij]>x)
                dr=mij-1;
            else
                st=mij+1;
    }
    if(st==dr)
    {
        if(v[st]==x)
            poz=st;
    }
    return poz;
}
//.................................
int c1(int v[],int n,int x)
{
    int poz=-1,st=0,dr=n-1,mij;
    while(st<dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            poz=mij;
            st=mij+1;
        }
        else
            if(v[mij]>x)
                dr=mij-1;
            else
            {
                st=mij+1;
                poz=mij;
            }
    }
    if(st==dr)
    {
        if(v[st]<=x)
            poz=st;
    }
    return poz;
}

int c2(int v[],int n,int x)
{
    int poz=-1,st=0,dr=n-1,mij;
    while(st<dr)
    {
        mij=(st+dr)/2;
        if(v[mij]==x)
        {
            poz=mij;
            dr=mij-1;
        }
        else
            if(v[mij]>x)
            {
                dr=mij-1;
                poz=mij;
            }
            else
                st=mij+1;
    }
    if(st==dr)
    {
        if(v[st]>=x)
            poz=st;
    }
    return poz;
}

int main()
{
    ifstream si;
    si.open("cautbin.in");
    FILE* so=fopen("cautbin.out","w");
    int n;
    si>>n;
    int i;
    int v[n];
    for(i=0;i<n;++i)
    {
        si>>v[i];
    }
    int m;
    si>>m;
    int a,b;
    while(m--)
    {
        si>>a>>b;
        if(a==0)
            fprintf(so,"%i\n",c0(v,n,b)+1);
        else
            if(a==1)
                fprintf(so,"%i\n",c1(v,n,b)+1);
            else
                fprintf(so,"%i\n",c2(v,n,b)+1);
    }
}