Cod sursa(job #3141233)

Utilizator davidgeo123Georgescu David davidgeo123 Data 13 iulie 2023 13:13:37
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.15 kb
#include <bits/stdc++.h>

using namespace std;

ifstream fin("cautbin.in");
ofstream fout("cautbin.out");

int main()
{
    int n, m;
    fin>>n;
    int v[n+1];
    for(int i=1; i<=n; i++)fin>>v[i];
    fin>>m;
    for(int i=1; i<=m; i++)
    {
        int o, x;
        fin>>o>>x;
        if(o==1)
        {
            int index=0;
            for(int bit=16; bit>=0; bit--)
            {
                index+=(1<<bit);
                if(index>n || v[index]>x)index-=(1<<bit);
            }
            if(v[index]==x)fout<<index<<'\n';
            else fout<<"-1\n";
        }
        if(o==2)
        {
            int index=0;
            for(int bit=16; bit>=0; bit--)
            {
                index+=(1<<bit);
                if(index>n || v[index]>x)index-=(1<<bit);
            }
            fout<<index<<'\n';

        }
        if(o==3)
        {
            int index=0;
            for(int bit=16; bit>=0; bit--)
            {
                index+=(1<<bit);
                if(index>n || v[index]>=x)index-=(1<<bit);
            }
            fout<<index+1<<'\n';
        }
    }
    return 0;
}