Cod sursa(job #2713207)

Utilizator herbertoHerbert Mohanu herberto Data 27 februarie 2021 14:07:32
Problema Cautare binara Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.39 kb
#include <fstream>

using namespace std;

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

int v[100001];

int main()
{
    int n, m, a, st, dr, mij, sol, i, j, q;
    fin>>n;
    for(i=1; i<=n; i++)
        fin>>v[i];
    fin>>m;
    for(j=1; j<=m; j++){
        fin>>q>>a;
        if(q==0){
            st=1;
            dr=n;
            sol=-1;
            while(st<=dr){
                mij=(st+dr)/2;
                if(v[mij]==a)
                    sol=mij;
                if(v[mij]<=a)
                    st=mij+1;
                if(v[mij]>a)
                    dr=mij-1;
            }
            fout<<sol<<endl;
        }
        if(q==1){
            st=1;
            dr=n;
            sol=-1;
            while(st<=dr){
                mij=(st+dr)/2;
                if(v[mij]<=a){
                    sol=mij;
                    st=mij+1;
                }
                else
                    dr=mij-1;
            }
            fout<<sol<<endl;
        }
        if(q==2){
            st=1;
            dr=n;
            sol=-1;
            while(st<=dr){
                mij=(st+dr)/2;
                if(v[mij]>=a){
                    sol=mij;
                    dr=mij-1;
                }
                else
                    st=mij+1;
            }
            fout<<sol<<endl;
        }
    }
    return 0;
}