Cod sursa(job #1968325)

Utilizator waren4Marius Radu waren4 Data 17 aprilie 2017 17:04:41
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.1 kb
#include <iostream>
#include <fstream>
#include <algorithm>

using namespace std;

ifstream f("cautbin.in"); ofstream g("cautbin.out");

int n, a[100005], m, c, x;

int cautbin(int x) {
    int st = 1, dr = n, mij, last = -1;
    while(st <= dr) {
        mij = (st + dr) / 2;
        if (x == a[mij]) {
            if (c == 0 || c == 1) {
                last = mij;
                st = mij + 1;
            }
            if (c == 2) {
                last = mij;
                dr = mij - 1;
            }
        }
        else {
            if(x < a[mij]) {
                if (c == 2) {
                    last = mij;
                }
                dr = mij - 1;
            }
            if(x > a[mij]) {
                if (c == 1) {
                    last = mij;
                }
                st = mij + 1;
            }
        }
    }
    return last;
}

int main(){
    int i;
    f>>n;
    for(i = 1; i <= n; ++i) {
        f>>a[i];
    }
    f>>m;
    for(i = 1; i <= m; ++i) {
        f>>c>>x;
        g<<cautbin(x)<<'\n';
    }
    return 0;
}