Cod sursa(job #2822666)

Utilizator Eduard_mihaiUngureanu Eduard Mihai Eduard_mihai Data 24 decembrie 2021 19:54:05
Problema Cautare binara Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.16 kb
#include <iostream>
#include <fstream>

using namespace std;

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

long long n,v[100001],m,op,x;

int caut0(int st, int dr, int x){
    int poz=-1;
    while (st<=dr){
        int mij=(st+dr)/2;
        if (v[mij]==x){
            poz=mij;
            st=mij+1;
        }
        else if (v[mij]>x) dr=mij-1;
        else st=mij+1;
    }
    return poz;
}

int caut1(int st, int dr, int x){
    int poz;
    while (st<=dr){
        int mij=(st+dr)/2;
        if (v[mij]<=x){
            poz=mij;
            st=mij+1;
        }
        else dr=mij-1;
    }
    return poz;
}

int caut2(int st, int dr, int x){
    int poz;
    while (st<=dr){
        int mij=(st+dr)/2;
        if (v[mij]>=x){
            poz=mij;
            dr=mij-1;
        }
        else st=mij+1;
    }
    return poz;
}

int main()
{
    in>>n;
    for (int i=1; i<=n; i++){
        in>>v[i];
    }
    in>>m;
    for (int i=1; i<=m; i++){
        in>>op>>x;
        if (op==0) out<<caut0(1, n, x)<<'\n';
        else if (op==1) out<<caut1(1, n, x)<<'\n';
        else out<<caut2(1, n, x);
    }
}