Cod sursa(job #1706889)

Utilizator Adia_IoanaRomanescu Adia Ioana Adia_Ioana Data 23 mai 2016 18:47:58
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.27 kb
#include <fstream>

using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,m,v[100001],i,cer,x;
int cer0(int x)
{
    int st=1,dr=n,poz=-1,mj;
    while(st<=dr)
    {
        mj=(st+dr)/2;
        if(v[mj]==x)
        {
            poz=mj;
            st=mj+1;
        }
        else {
            if(x<v[mj]) dr=mj-1;
             else st=mj+1;
        }
    }
    return poz;
}
int cer1(int x)
{
    int st=1,dr=n,poz=-1,mj;
    while(st<=dr)
    {
        mj=(st+dr)/2;
        if(v[mj]<=x)
        {
            poz=mj;
            st=mj+1;
        }
        else {if(x<v[mj]) dr=mj-1;
             else st=mj+1;
    }}
    return poz;
}
int cer2(int x)
{
    int st=1,dr=n,poz=-1,mj;
    while(st<=dr)
    {
        mj=(st+dr)/2;
        if(v[mj]>=x)
        {
            poz=mj;
            dr=mj-1;
        }
        else{
            if(x>v[mj]) st=mj+1;
             else dr=mj-1;
        }
    }
    return poz;
}
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++)
    {
        fin>>cer>>x;
        if(cer==0) fout<<cer0(x)<<'\n';
        if(cer==1) fout<<cer1(x)<<'\n';
        if(cer==2) fout<<cer2(x)<<'\n';
    }
    return 0;
}