Cod sursa(job #3174880)

Utilizator marc.mitrascaMitrasca Marc Patric marc.mitrasca Data 25 noiembrie 2023 10:40:34
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.69 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int main()
{
    int n,m,v[100001],s,q,x;
    fin>>n;
    for(int i=1; i<=n; i++)
        fin>>v[i];
    fin>>m;
    for(int i=1; i<=m; i++)
    {
        fin>>s>>q;
        int left=1,right=n,ans=-1;
        if(s==0)
        {
            int mid=(left+right)/2;
            while(left<=right)
            {
                mid=(left+right)/2;
                if(v[mid]<=q)
                {
                    if(v[mid]==q&&ans<mid)
                        ans=mid;
                    left=mid+1;

                }
                else if(v[mid]>q)
                    right=mid-1;
            }
                fout<<ans<<endl;
        }
        if(s==1)
        {
            int mid=(left+right)/2;
            while(left<=right)
            {
                mid=(left+right)/2;
                if(v[mid]<=q)
                {
                    if(ans<mid)
                        ans=mid;
                    left=mid+1;

                }
                else if(v[mid]>q)
                    right=mid-1;
            }
            fout<<ans<<endl;
        }
        if(s==2){
            int ans=n;
            int mid=(left+right)/2;
            while(left<=right)
            {
                mid=(left+right)/2;
                if(v[mid]>=q)
                {
                    if(ans>mid)
                        ans=mid;
                    right=mid-1;

                }
                else if(v[mid]<q)
                    left=mid+1;
            }
            fout<<ans<<endl;
        }

    }
    return 0;
}