Cod sursa(job #2293911)

Utilizator TeodorAxinteAxinte Teodor TeodorAxinte Data 1 decembrie 2018 18:22:46
Problema Cautare binara Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.07 kb
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int v[1010],n,m,t,nr;
int CB(int st,int dr,int x)
{
    if(st>dr) return -1;
    int m=(st+dr)/2;
    if(v[m]==x) return m;
    else if(x<v[m]) return CB(st,m-1,x);
    else return CB(m+1,dr,x);
}
int LOW(int st,int dr,int x)
{
    if(st>dr) return st;
    else
    {
        int m=(st+dr)/2;
        if(x>v[m]) return LOW(m+1,dr,x);
        else return LOW(st,m-1,x);
    }
}
int UP(int st,int dr,int x)
{
    if(st>dr) return st;
    else
    {
        int m=(st+dr)/2;
        if(x>=v[m]) return UP(m+1,dr,x);
        else return UP(st,m-1,x);
    }
}
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(;m;m--)
    {
        fin>>t>>nr;
        if(t==0)
        {
            if(CB(1,n,nr)!=-1)
            fout<<UP(1,n,nr)-1<<'\n';
            else fout<<"-1\n";
        }
        if(t==1)
        fout<<UP(1,n,nr)-1<<'\n';
        if(t==2)
        fout<<LOW(1,n,nr)<<'\n';

    }
    return 0;
}