Cod sursa(job #2069622)

Utilizator SpiristulTeribilStefan Vilcu SpiristulTeribil Data 18 noiembrie 2017 17:12:44
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.86 kb
#include <fstream>

using namespace std;

int v[100000];

int main() {
    ifstream cin ("cautbin.in");
    ofstream cout("cautbin.out");
    int n, m ;
    cin >> n ;
    for (int i = 1; i <= n; ++i) {
        cin >> v[i];
    }
    cin >> m;
    int t, x, pas, r;
    for (int i = 0; i < m; ++i) {
        cin >> t >> x ;
        pas = 1 << 16 ;
        r = 0 ;
        if (t < 2)
            while (pas > 0) {
                if (r + pas <= n && v[r + pas] <= x)
                    r += pas ;
                pas >>= 1 ;
            }
        else
            while (pas > 0) {
                if (r + pas <= n && v[r + pas] < x)
                    r += pas ;
                pas >>= 1 ;
            }
        if (t == 0) {
            if (v[r] != x)
            r = -1 ;
        }
        else if (t == 2)
            ++r ;
        cout << r << "\n";
    }
    return 0;
}