Cod sursa(job #1208643)

Utilizator crysstyanIacob Paul Cristian crysstyan Data 16 iulie 2014 11:54:48
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.14 kb
#include <fstream>
using namespace std;
int v[100005];

int cautbin0(int st, int dr, int x)
{
    int med;
    while (st<=dr)
    {
        med=(st+dr)/2;
       if (v[med]<=x)
       st=med+1;
       else
       dr=med-1;
    }
    med=(st+dr)/2;
    while (v[med]>x) med--;
    if (v[med]==x) return med;
    else return -1;
}

int cautbin1(int st, int dr, int x)
{
    int med;
    while (st<=dr)
    {
        med=(st+dr)/2;
        if (v[med]<=x)
        st=med+1;
        else
        dr=med-1;
    }
    med=(st+dr)/2;
    while (v[med]>x) med--;
    return med;
}

int cautbin2(int st, int dr, int x)
{
    int med;
    while (st<=dr)
    {
        med=(st+dr)/2;
        if (v[med]>x)
        st=med+1;
        else
        dr=med-1;
    }
    while (v[med]<x) med++;
    return med;
}
int main()
{
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int i,n,x,tip,nrt;
f>>n;
for (i=1; i<=n; i++) f>>v[i];
f>>nrt;
for (i=1; i<=nrt; i++)
{
    f>>tip>>x;
    if (tip==0) g<<cautbin0(1,n,x)<<'\n';
    if (tip==1) g<<cautbin1(1,n,x)<<'\n';
    if (tip==2) g<<cautbin2(1,n,x)<<'\n';
}
return 0;
}