Cod sursa(job #3363328)

Utilizator PetruRigaRiga-Fereu Petru Vlad PetruRiga Data 16 august 2026 15:53:19
Problema Cautare binara Scor 0
Compilator cpp-32 Status done
Runda Arhiva educationala Marime 1 kb
#include <iostream>
using namespace std;
int v[101],n;
int cb0(int x)
{
    int st=0,dr=n,mij;
    while(dr-st>1)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
            st=mij;
        else
            dr=mij;
    }
    if(v[st]==x)
        return st;
    return -1;
}
int cb1(int x)
{
    int st=0,dr=n,mij;
    while(dr-st>1)
    {
        mij=(st+dr)/2;
        if(v[mij]<=x)
            st=mij;
        else
            dr=mij;
    }
        return st;
}
int cb2(int x)
{
    int st=-1,dr=n-1,mij;
    while(st-dr>1)
    {
        mij=(st+dr)/2;
        if(v[mij]>=x)
            dr=mij;
        else
            st=mij;
    }
        return dr;
}
int main()
{
    int x,m,y;
    cin>>n;
    for(int i=0;i<n;i++)
    {
        cin>>v[i];
    }
    cin>>m;
    for(int i=0;i<m;i++)
    {
        cin>>y>>x;
        if(y==0)
        cout<<cb0(x);
        if(y==1)
        cout<<cb1(x);
        if(y==2)
        cout<<cb2(x);
    }
    return 0;
}