Cod sursa(job #2254663)

Utilizator 0738076326Simon Wil 0738076326 Data 5 octombrie 2018 18:30:59
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.7 kb
#include <iostream>
#include <fstream>

using namespace std;

ifstream f("cautbin.in");
ofstream g("cautbin.out");

int caut(int s, int d, int v[], int x)
{
    int m;
    if(s>d)
        return -1;
    else{
            m =(s+d)/2;
            if (x==v[m])
                return m;
            if (x<v[m])
                return caut(s,m-1,v, x);
            else
                return caut(m+1,d,v, x);
    }
}

int n,v[100001],i,m,x,d;

int main()
{
    f>>n;
    for(i=1; i<=n; i++)
        f>>v[i];

    f>>m;
    for(i=1; i<=m; i++){
        f>>d>>x;
        if(d==0){
            d=caut(1, n, v, x);
            if(d!=1)
                while(v[d]==x)
                d++;
            d--;

            g<<d<<"\n";
        }
        else
            if(d==1){
             d=caut(1, n, v, x);
             if(d!=-1)
            {while(v[d]==x)
                d++;
             d--;
            g<<d<<"\n";}
            else{
                while(d!=-1)
                {
                    x--;
                    d=caut(1, n, v, x);
                }
                while(v[d]<=x)
                    d++;
                d--;
                g<<d<<"\n";
            }
        }
        else{
             d=caut(1, n, v, x);
             if(d!=-1)
            {while(v[d]==x)
                d--;
             d++;
            g<<d<<"\n";}
            else{
                while(d!=-1)
                {
                    x++;
                    d=caut(1, n, v, x);
                }
                while(v[d]>=x)
                    d--;
                d++;
                g<<d<<"\n";
            }
        }
    }


    return 0;
}