Cod sursa(job #2420354)

Utilizator mihnea03Ciocioiu Mihnea mihnea03 Data 11 mai 2019 16:26:33
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.17 kb
#include <iostream>
#include <fstream>
#include <bitset>
using namespace std;
long long a[100001],i,k,n,m,st,dr,mij,ok,x;
int main()
{
    ifstream fin("cautbin.in");
    ofstream fout("cautbin.out");
    fin>>n;
    for (i=1;i<=n;i++) {
        fin>>a[i];
    }
    fin>>m;
    for (i=1;i<=m;i++) {
        fin>>k>>x;
        if (k==0) {
            st=1,dr=n;
            ok=-1;
            while (st<=dr) {
                mij=(st+dr)/2;
                if (a[mij]==x) ok=mij;
                if (a[mij]<=x) st=mij+1;
                else dr=mij-1;
            }
            fout<<ok<<"\n";
        }
        else if (k==1) {
            st=1,dr=n;
            while (st<dr) {
                mij=(st+dr)/2;
                if (a[mij]<=x) st=mij+1;
                else dr=mij;
            }
            mij=(st+dr)/2;
            if (a[mij]>x) mij--;
            fout<<mij<<"\n";
        }
        else if (k==2) {
            st=1,dr=n;
            while (st<dr) {
                mij=(st+dr)/2;
                if (a[mij]>=x) dr=mij;
                else st=mij+1;
            }
            fout<<st<<"\n";
        }
    }
    return 0;
}