Cod sursa(job #2805890)

Utilizator Bogdan.paun50Mandresi Bogdan Bogdan.paun50 Data 22 noiembrie 2021 05:22:44
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.39 kb
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

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

int n, v[100001], m, q, nr, st, dr, mid;

int main()
{
    fin >> n;
    for(int i = 1; i <= n; i++)
        fin >> v[i];
    fin >> m;
    for(int i = 1; i <= m; i++)
    {
        fin >> q >> nr;
        if(q == 0)
        {
            st = 1; dr = n;
            while(st <= dr)
            {
                mid = (st + dr) / 2;
                if(v[mid] > nr)
                    dr = mid - 1;
                else st = mid + 1;
            }
            if(v[dr] == nr)
                fout << dr << "\n";
            else fout << "-1" << "\n";
        }
        else if(q == 1)
        {
            st = 1; dr = n;
            while(st <= dr)
            {
                mid = (st + dr) / 2;
                if(v[mid] > nr)
                    dr = mid - 1;
                else
                    st = mid + 1;
            }
            fout << dr << "\n";
        }
        else if(q == 2)
        {
            st = 1; dr = n;
            while(st <= dr)
            {
                mid = (st + dr) / 2;
                if(v[mid] < nr)
                    st = mid + 1;
                else
                    dr = mid - 1;
            }
            fout << st << "\n";
        }
    }
    return 0;
}