Cod sursa(job #2201412)

Utilizator daniel.vbVasile Daniel daniel.vb Data 4 mai 2018 18:00:31
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.55 kb
#include <stdio.h>




int n,m,x,v;
int a[100001];




int main()
{
    int i,st,dr,mij,opt;
    FILE *f,*g;

    f=fopen("cautbin.in","r");
    g=fopen("cautbin.out","w");

    fscanf(f,"%d",&n);

    for(i=1;i<=n;i++)
        fscanf(f,"%d ",&a[i]);


    fscanf(f,"%d",&m);

    for(i=1;i<=m;i++)
    {
        fscanf(f,"%d%d",&v,&x);
        st=1;dr=n;
        if(v==0)
        {
            opt=-1;
            while(st<=dr)
            {
                mij=st+(dr-st)/2;
                if(x==a[mij])
                {
                    opt=mij;
                    st=mij+1;
                    continue;
                }
                if(x<a[mij])
                    dr=mij-1;
                else
                    st=mij+1;
            }
        }
        if(v==2)
        {
            while(st<=dr)
            {
                mij=st+(dr-st)/2;
                if(a[mij]>=x)
                {
                    opt=mij;
                    dr=mij-1;
                    continue;
                }
                else
                    st=mij+1;
            }
        }
        if(v==1)
        {
            while(st<=dr)
            {
                mij=st+(dr-st)/2;
                if(a[mij]<=x)
                {
                    opt=mij;
                    st=mij+1;
                    continue;
                }
                else
                    dr=mij-1;
            }
        }
        fprintf(g,"%d\n",opt);
    }

    fclose(f);
    fclose(g);
}