Cod sursa(job #2638150)

Utilizator Razvan667Cutuliga Razvan Razvan667 Data 27 iulie 2020 12:17:46
Problema Cautare binara Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.16 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int a[25001],b[200001],t,n,i,j,x,y,m,c;
int cautare(int st, int dr)
{
    int poz=0;
    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if(a[mij]==x)
            {
                poz=mij;
                st=mij+1;
            }
        else
        {
            if(a[mij]>x)
                dr=mij-1;
            else st=mij+1;
        }
    }
    if(poz!=0) return poz;
    else return -1;

}
int cautare_st( int st, int dr)
{

    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if(a[mij]>=x)
            dr=mij-1;
        else st=mij+1;
    }
    return st;
}
int cautare_dr(int st, int dr)
{
    while(st<=dr)
    {
        int mij=(st+dr)/2;
        if(a[mij]<=x)
            st=mij+1;
        else dr=mij-1;
    }
    return dr;
}
int main()
{
    f>>n;
    for(i=1; i<=n; i++)
        f>>a[i];
    f>>m;
    for(i=1;i<=m;i++)
    {
        f>>c>>x;
        if(c==0) g<<cautare(1,n)<<'\n';
        if(c==1) g<<cautare_dr(1,n)<<'\n';
        if(c==2) g<<cautare_st(1,n)<<'\n';
    }
    return 0;
}