Cod sursa(job #2573784)

Utilizator LeperBearMicu Alexandru LeperBear Data 5 martie 2020 19:09:39
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda r3capitusulare Marime 1.36 kb
#include <fstream>
#define ios ios_base::sync_with_stdio(false);
#define nmax 100010

using namespace std;

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

int n,m;
int s[nmax];

void citire(){
    cin>>n;
    for (int i=1;i<=n;i++) cin>>s[i];
    cin>>m;
}

void cautbin(int t){
    for (int i=1;i<=t;i++){
        int p,x,st=1,dr=n,mij;
        cin>>p>>x;
        if (p==0){
            while (st<dr){
                mij=st+(dr-st)/2;
                if (s[mij]<=x) st=mij+1;
                else dr=mij-1;
            }
            mij=st+(dr-st)/2;
            if (s[mij]>x) mij--;
            if (s[mij]==x) cout<<mij<<'\n';
            else cout<<-1<<'\n';
        }
        else if (p==1){
            while (st<dr){
                mij=st+(dr-st)/2;
                if (s[mij]<=x) st=mij+1;
                else dr=mij;
            }
            mij=st+(dr-st)/2;
            if (s[mij]>x) mij--;
            cout<<mij<<'\n';
        }
        else {
            while (st<dr){
                mij=st+(dr-st)/2;
                if (s[mij]<x) st=mij+1;
                else dr=mij;
            }
            mij=st+(dr-st)/2;
            if (s[mij]<x) mij++;
            cout<<mij<<'\n';
        }
    }
}

int main()
{
    ios;
    cin.tie(0);
    cout.tie(0);
    citire();
    cautbin(m);
    return 0;
}