Cod sursa(job #1059456)

Utilizator CatlinvCatalin Sbera Catlinv Data 16 decembrie 2013 18:38:36
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.16 kb
#include <fstream>

using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int v[100005],n;
int caz0(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 caz1(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 caz2(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;
    for(int i=1;i<=m;i++)
    {
    f>>tip>>x;
        if(tip==0)
            g<<caz0(x)<<"\n";
        if(tip==1)
            g<<caz1(x)<<"\n";
        if(tip==2)
            g<<caz2(x)<<"\n";
    }
    return 0;
}