Cod sursa(job #3265027)

Utilizator popescubogdanPopescu Bogdan popescubogdan Data 26 decembrie 2024 16:10:27
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.98 kb
#include <fstream>

using namespace std;

ifstream cin("cautbin.in");
ofstream cout("cautbin.out");

int v[100000];
int n;

void cautbin(int x,int cer)
{
    int st=0,dr=n;
    while(st<dr)
    {
        int mij=(st+dr)/2;
        if(v[mij]<x)
        st=mij+1;
        else
        dr=mij;
    }
    //cout<<st<<" "<<dr<<'\n';
    if(cer==0)
    {
        if(v[st]!=x)
        {
            cout<<-1<<'\n';
            return;
        }
        while(v[st]==x)
        st++;
        cout<<st<<'\n';
        return ;
    }
    if(cer==1)
    {
        if(v[st]!=x)
        {
            cout<<st<<'\n';
            return;
        }
        while(v[st]==x)
        st++;
        cout<<st<<'\n';
        return ;
    }
    if(cer==2)
    {
        cout<<st+1<<'\n';
        return;
    }
}


int main()
{
    int m;
    cin>>n;
    for(int i=0;i<n;i++)
    {
        cin>>v[i];
    }
    cin>>m;
    int t,x;
    for(int i=0;i<m;i++)
    {
        cin>>t>>x;
            cautbin(x,t);
    }

    return 0;
}