Cod sursa(job #2485646)

Utilizator DinuD11Dinu Dragomirescu DinuD11 Data 1 noiembrie 2019 20:52:12
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.25 kb
#include <iostream>
#include <fstream>

using namespace std;

int v[100001], n;

int cautare_binara(int t, int x) {
    int st=0, dr=n-1, m, r=-1;
    if(t == 0) {
        while(st <= dr) {
            m = (st + dr)/2;
            if(v[m] == x)
                r = max(r, m);
            if(v[m] < x)
                st = m+1;
            else
                dr = m-1;
        }
        return r;
    }
    if(t == 1) {
        while(st <= dr) {
            m = (st + dr)/2;
            if(v[m] <= x)
                r = m;
            if(v[m] < x)
                st = m+1;
            else
                dr = m-1;
        }
        return r;
    }
    if(t == 2) {
        while(st <= dr) {
            m = (st + dr)/2;
            if(v[m] >= x)
                r = m;
            if(v[m] < x)
                st = m+1;
            else
                dr = m-1;
        }
        return r;
    }
}

int main() {
    ifstream fin("cautbin.in");
    ofstream fout("cautbin.out");
    fin >> n;
    for(int i = 0; i < n; i++)
        fin >> v[i];
    int m, t, x;
    fin >> m;
    for(int i = 0; i < m; i++)
    {
        fin >> t >> x;
        fout << cautare_binara(t, x) << '\n';
    }
    cout << cautare_binara(2, 3);
    fin.close();
    fout.close();
    return 0;
}