Cod sursa(job #1051768)

Utilizator silviu12vranau silviu12 Data 10 decembrie 2013 16:25:01
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.11 kb
#include <fstream>

using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int v[10005],n;
int op0(int x)
    {
        int st,dr,mij;
        st=1;dr=n;
        while(st<dr)
        {
             mij=(st+dr)/2;
             if(v[mij]<x)st=mij+1;
             else dr=mij;
        }
        for(;st<n&&v[st]==x;++st);
        if(v[st]>x)--st;
        if(v[st]!=x)return -1;
        return st;
    }
int op1(int x)
    {
        int st=1,dr=n,mij;
        while(st<dr)
        {
            mij=(st+dr+1)/2;
            if(v[mij]>x)dr=mij-1;
            else st=mij;


        }
        return st;
    }

int op2(int x)
    {
      int st=1,dr=n,mij;
      while(st<dr)
      {
          mij=(st+dr)/2;
          if(v[mij]<x)st=mij+1;
          else dr=mij;
      }
          return st;
    }
int main()
{
    int x,tip,m;
    f>>n;
    for(int i=1;i<=n;i++)f>>v[i];
    f>>m;
    f>>tip;
    f>>x;
    for(int i=1;i<=m;i++){
    if(tip==0)
    g<<tip<<" "<<op0(x)<<" ";
    if(tip==1)
    g<<tip<<" "<<op1(x);
    if(tip==2)
    g<<tip<<" "<<op2(x);}

}