Cod sursa(job #2277662)

Utilizator MirceaCozmaciucMircea-Vlad Cozmaciuc MirceaCozmaciuc Data 6 noiembrie 2018 18:21:46
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 2.36 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int cautbin0(int st, int dr, int v[10000], int x)
{
    int m=(st+dr)/2;
    if(st<dr)
        if(v[m]>x)
            return cautbin0(st,m,v,x);
        else if(v[m]<x)
            return cautbin0(m+1,dr,v,x);
        else if(v[m]==x)
        {
            while(v[m]==v[m+1])
                m++;
            return m;
        }
    if(st==dr && v[st]==x)
    {
        while(v[st]==v[st+1])
            st++;
        return st;
    }
    else
        return -1;
}

int cautbin2(int st, int dr, int v[10000], int x)
{
    int m=(st+dr)/2;
    if(st<dr)
        if(v[m]>x)
            return cautbin2(st,m,v,x);
        else if(v[m]<x)
            return cautbin2(m+1,dr,v,x);
        else if(v[m]==x)
        {
            while(v[m]==v[m-1])
                m--;
            return m;
        }
    if(st==dr && v[st]==x)
    {
        while(v[st]==v[st-1])
            st--;
        return st;
    }
    else
    {
        while(v[st]>x)
            st--;
        while(v[st]<x)
            st++;
        if(v[st]<x)
            return st+1;
        else
            return st;
    }
}
int cautbin1(int st, int dr, int v[10000], int x)
{
    int m=(st+dr)/2;
    if(st<dr)
        if(v[m]>x)
            return cautbin2(st,m,v,x);
        else if(v[m]<x)
            return cautbin2(m+1,dr,v,x);
        else if(v[m]==x)
        {
            while(v[m]==v[m+1])
                m++;
            return m;
        }
    if(st==dr && v[st]==x)
    {
        while(v[st]==v[st+1])
            st++;
        return st;
    }
    else
    {
        while(v[st]>x)
            st--;
        while(v[st]<x)
            st++;
        if(v[st]>x)
            return st-1;
        else
            return st;
    }
}
int main()
{
    int n,v[10000],x,m,a;
    f>>n;
    for(int i=1; i<=n; i++)
        f>>v[i];
    f>>m;
    for(int i=1; i<=m; i++)
    {
        f>>a>>x;
        if(a==0)
            g<<cautbin0(1,n,v,x)<<endl;
        if(a==1)
            if(x>v[n])
            cout<<n<<endl;
        else
            g<<cautbin1(1,n,v,x)<<endl;
        if(a==2)
            if(x<v[1])
            cout<<"1"<<endl;
        else
            g<<cautbin2(1,n,v,x)<<endl;
    }
    return 0;
}