Cod sursa(job #2357666)

Utilizator Ciprian_PizzaVasile Capota Ciprian_Pizza Data 27 februarie 2019 17:20:46
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.03 kb
#include <bits/stdc++.h>
#define nmax 100001

using namespace std;

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

int n,a[nmax],m;

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

void Solve()
{
    int i,op,x,poz;
    fin >> n;
    for(i = 1; i <= n; i++)
        fin >> a[i];
    fin >> m;
    for(i = 1; i <= m; i++)
    {
        fin >> op >> x;
        poz = CB(x);
        if(op == 0)
        {
            while(a[++poz] == x) ;
            poz--;
        }
        if(op == 1)
        {
            while(a[++poz] == x) ;
            poz--;
        }
        if(op == 2)
        {
            while(a[--poz] == x) ;
            poz++;
        }
        fout << poz << "\n";
    }
}

int main()
{
    Solve();
    fin.close();
    fout.close();
    return 0;
}