Cod sursa(job #1369390)

Utilizator irinalazarLazar Irina irinalazar Data 3 martie 2015 00:25:49
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.16 kb
#include<fstream>
using namespace std;
int v[100001];
int intrebare1(int n, int x, int v[])
{
    int m,p=1,u=n;
    while(p<=u)
    {
        m=(p+u)/2;
        if(v[m]<=x)
            p=m+1;
        else
            u=m-1;
    }
    m=(u+p)/2;
    if(v[m]==x) return m;
    return -1;
}
int intrebare2(int n, int x, int v[])
{
    int m,p=1,u=n;
    while(p<=u)
    {
        m=(p+u)/2;
        if(v[m]<=x)
            p=m+1;
        else
            u=m-1;
    }
    m=(u+p)/2;
    if(v[m]<=x) return m;
}
int intrebare3(int n, int x, int v[])
{
    int m,p=1,u=n;
    while(p<=u)
    {
        m=(p+u)/2;
        if(v[m]>=x)
            u=m-1;
        else
            p=m+1;
    }
    m=(u+p)/2+1;
    if(v[m]>=x) return m;
}
int main()
{
    ifstream f("cautbin.in");
    ofstream g("cautbin.out");
    int n,m,i,x,y;
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>v[i];
    }
    f>>m;
    for(i=1;i<=m;i++)
    {
        f>>x>>y;
        if(x==0) g<<intrebare1(n,y,v)<<'\n';
        else if(x==1) g<<intrebare2(n,y,v)<<'\n';
        else g<<intrebare3(n,y,v)<<'\n';
        //g<<x<<' '<<y;
    }
    return 0;
}