Cod sursa(job #3296350)

Utilizator iordacheMatei Iordache iordache Data 12 mai 2025 12:13:45
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.26 kb
#include <bits/stdc++.h>
#define pb push_back
//#define int long long
using namespace std;
const int N=1e5+5;
int v[N];
signed main()
{
    ifstream cin("cautbin.in");ofstream cout("cautbin.out");
    int n;
    cin>>n;
    for(int i=1;i<=n;++i) cin>>v[i];
    int q;cin>>q;
    while(q--)
    {
        int op;cin>>op;
        if(op==0)
        {
            int x;cin>>x;
            int l=1,r=n,ans=0;
            while(l<=r)
            {
                int mij=(l+r)/2;
                if(v[mij]<=x) ans=mij,l=mij+1;
                else r=mij-1;
            }
            if(ans==0||v[ans]!=x) cout<<"-1\n";
            else cout<<ans<<'\n';
        }
        else if(op==1)
        {
            int x;cin>>x;
            int l=1,r=n,ans=0;
            while(l<=r)
            {
                int mij=(l+r)/2;
                if(v[mij]<=x) ans=mij,l=mij+1;
                else r=mij-1;
            }
            cout<<ans<<'\n';
        }
        else
        {
            int x;cin>>x;
            int l=1,r=n,ans=0;
            while(l<=r)
            {
                int mij=(l+r)/2;
                if(v[mij]>=x) ans=mij,r=mij-1;
                else l=mij+1;
            }
            cout<<ans<<'\n';
        }
    }
}