Cod sursa(job #1966090)

Utilizator GodSlayerTabara Emanuel GodSlayer Data 14 aprilie 2017 21:20:38
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.41 kb
#include <fstream>

using namespace std;
ifstream cin("cautbin.in");
ofstream cout("cautbin.out");
int n,v[100005],x,i,m,c;
int c0(int st, int dr,int v[],int x)
{
    int mij=(dr+st)/2;
    while(st<=dr)
    {
        if(v[mij]<=x)
        {
            st=mij+1;
        }
        else
            dr=mij-1;
        mij=(st+dr)/2;
    }
    mij=(dr+st)/2;
    if (v[mij] > x) mij --;
    if (v[mij] == x)
        return mij;
    return -1;
}
int c1(int st,int dr,int v[],int x)
{
    int mij=(dr+st)/2;
    while(st<dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
        {
            st=mij+1;
        }
        else
            dr=mij;
        mij=(st+dr)/2;
    }
   mij=(st+dr)/2;
   if(v[mij]>x)
        --mij;
   return mij;
}
int c2(int st,int dr,int v[],int x)
{
    int mij=(dr+st)/2;
    while(st<dr)
    {
        mij=(st+dr)/2;
        if(v[mij]<x)
        {
            st=mij+1;
        }
        else
            dr=mij;
        mij=(st+dr)/2;
    }
    if(v[mij]<x)
        ++mij;
    return mij;
}
int main()
{
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>v[i];
    cin>>m;
    for(i=1;i<=m;i++)
    {
        cin>>c>>x;
        if(c==0)
            cout<<c0(1,n,v,x)<<"\n";
        else
            if(c==1)
                cout<<c1(1,n,v,x)<<"\n";
            else
                cout<<c2(1,n,v,x)<<"\n";
    }
    return 0;
}