Cod sursa(job #2001837)

Utilizator patcasrarespatcas rares danut patcasrares Data 17 iulie 2017 20:50:28
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.08 kb
#include<fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,m,a[100005],t,x,b[100005];
void v0()
{
    int st=1,dr=n,poz=-1,m;
    while(st<dr)
    {
        m=(st+dr+1)/2;
        if(a[m]<=x)
            st=m;
        else
            dr=m-1;
    }
    if(a[st]==x)
        poz=st;
    fout<<poz<<'\n';
}
void v1()
{
    int st=1,dr=n,poz=-1,m;
    while(st<dr)
    {
        m=(st+dr+1)/2;
        if(a[m]<=x)
            st=m;
        else
            dr=m-1;
    }
    if(a[st]<=x)
        poz=st;
    fout<<poz<<'\n';
}
void v2()
{
    int st=1,dr=n,poz=-1,m;
    while(st<dr)
    {
        m=(st+dr)/2;
        if(a[m]<x)
            st=m+1;
        else
            dr=m;
    }
    if(a[dr]>=x)
        poz=dr;
    fout<<poz<<'\n';

}
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    fin>>m;
    for(int i=1;i<=m;i++)
    {
        fin>>t>>x;
        if(t==0)
            v0();
        if(t==1)
            v1();
        if(t==2)
            v2();
    }


}