Cod sursa(job #3292876)

Utilizator Sorin_GabrielGabara Sorin Gabriel Sorin_Gabriel Data 9 aprilie 2025 16:30:38
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.19 kb
#include <iostream>
#include <bits/stdc++.h>
#define VMAX 100005
#define INF 2147000000
using namespace std;
ifstream fin ("cautbin.in");
ofstream fout ("cautbin.out");

int numere[VMAX];
int n;

int cb_max(int nr)
{
    int st, dr, mij;
    st=0;
    dr=n+1;
    while(dr-st>1)
    {
        mij=(st+dr)/2;
        if(numere[mij]<=nr)
            st=mij;
        else
            dr=mij;
    }
    return st;
}

int cb_min(int nr)
{
    int st, dr, mij;
    st=0;
    dr=n+1;
    while(dr-st>1)
    {
        mij=(st+dr)/2;
        if(numere[mij]>=nr)
            dr=mij;
        else
            st=mij;
    }
    return dr;
}

int main()
{
    int m,i,j,k,t,q,nr,minim,maxim,st,dr,mij;
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>numere[i];
    fin>>m;
    while(m--)
    {
        fin>>i>>j;
        if(i==0)
        {
            nr=cb_max(j);
            if(numere[nr]==j)
                fout<<nr<<'\n';
            else
                fout<<"-1\n";
        }
        else if(i==1)
        {
            fout<<cb_max(j)<<'\n';
        }
        else
        {
            fout<<cb_min(j)<<'\n';
        }
    }

    return 0;
}