Cod sursa(job #3288495)

Utilizator fabiplavatPlavat Fabian-Remus fabiplavat Data 22 martie 2025 15:32:44
Problema Cautare binara Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.56 kb
#include <bits/stdc++.h>
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");

int v[100000];

bool verif(int acc,int currentpower,int k,int n)
{

    return (acc + currentpower < n) && (v[acc+currentpower]<=k);
}

int cautbin(int problem,int currentpower, int searchedelem,int n)
{
    int acc=0;
    while(currentpower>0)
    {

        if(verif(acc,currentpower,searchedelem,n))
            acc+=currentpower;
        currentpower>>=1;
    }

    if(problem==0){
    if (acc < n && v[acc] == searchedelem) {
        while (acc + 1 < n && v[acc + 1] == searchedelem) {
            acc++;
        }
        return 1+acc;
    }

    return -1;
    }

    if(problem==1&& v[acc] <= searchedelem){
    if (acc < n) {
        while (acc + 1 < n && v[acc + 1] == searchedelem) {
            acc++;
        }
        return 1+acc;
    }

    return -1;
    }

    if (problem == 2) {
    if (acc < n) {
        while (acc < n && v[acc] < searchedelem) {
            acc++;
        }

        if (acc < n) {
            return 1 + acc;
        }
    }
    return -1;
}

    return -1;

}

int main()
{
    int n,m;
    int problem,val;
    fin>>n;
    int currentpower=0X1;

    while(currentpower<=n)
    {
        currentpower<<=1;
    }
    currentpower>>=1;

    for(int i=0;i<n;i++)
        fin>>v[i];

    fin>>m;

    for(int i=0;i<m;i++)
        {
            fin>>problem>>val;
            fout<<cautbin(problem,currentpower,val,n)<<'\n';
        }
    return 0;
}